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Seth Thomas movement identification
Seth Thomas movement identification is a fairly easy process. ST clock movements have specific markings that identify them. Their fame began in the Antique days. They were known for making their own movements and clock cases. Of course, the craftsmanship was astounding. After the war era, they did not make anymore clock movements. Instead the use of Hermle clock movements began.
In the end
For the most part, the name Seth Thomas did not stay with one company very long after the war. The outcome of these takeovers are three types of Seth Thomas clock movements. The Antique Seth Thomas were in production during and long before WW2. The use of German units such as Hermle, as well as movements that operate by battery, also began post WW2 by Seth Thomas. Hermle clock movements are German made and of the highest quality. Clockworks offers these types of movements.
Is the clock an antique Seth Thomas?
There are a few ways to tell if the ST is an antique. The easiest way is if there are no pits in the movement plates. Please see the picture below. Notice the pattern on the outer plates. The antique Seth Thomas clock movements never had this design pattern on them. It will have ST with a circle around it for a logo. Additionally, the movement will say made in USA. They may also have a few numbers on it such as 89 or 124. It also means that it is not available new, and made before 1950. A repair would be the only option.
Modern Seth Thomas Movement Identification
The picture displays the small bumps, or pits, in the movement plates. This design on the Seth Thomas movement indicates some interesting things. In short, the date of the movement is between 1950 and 1979, and it was made in Germany. This also means have a good chance of getting a new movement from Clockworks. To get a new movement means the cost is a fraction of the price of an overhaul. It will also ship out right away. The clock will be running right away instead of months later. It is not possible to restore a clock movement so it is better than new. To order a new movement, match up the numbers on the Seth Thomas page. If questions please email us.
I have a Seth Thomas clock that has a Franz Hermle movement. The identifier on the movement is 1057-020. The only other information is NO (0) JEWELS, UNADJUSTED, MADE IN WEST GERMANY. There is a symbol at the top that looks kind of like an A but the cross bar is at the bottom and curved upward. I was trying to find this movement for sale but having no luck.
Please order the 1050-020 from this link
https://www.clockworks.com/product/new-1050-020-clock-movement-by-hermle
Look at the pic and also recheck the number. I think you will find you need 1050-020 because I never heard of 1057-020.
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
Looking for a wiegt for Seth Thomas 1899 mantel clock
You mean a pendulum correct?
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
Hello, I have a Seth Thomas 89J and just got it working for the first time in almost 80 years. My question is at what time and how many times should it chime? It seems to be doing it quarterly on the hour but chimes what seems seems like over 100 times. Is this normal?
Not normal.
Could be a quick fix with a zoom call, we offer it at this link
https://www.clockworks.com/product/conference-with-a-clock-repair-specialist
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
where can i find a key for my ST 5704
This link
https://www.clockworks.com/product/brass-single-end-clock-key
They liked size 7 alot
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
I have what I believe is a Seth Thomas Whitby from around 1923 that has a 48R stamped on the movement.. I’ve seen a Whitby in a ’22 catalog (with no mention of movement) and a ’26 catalog (where it is shown with a description of a 120 movement), but I haven’t been able to see any catalog with a 48R. The 48R also seems to have parts that look like they’re from a 51 movement. I got an very expensive repair estimate so I was wondering about just swapping an identical (or similar enough) working movement?
Got a pic of this one?
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
Hello James. Here’s the movement. The 48R stamp is at the bottom-center but is obscured by the pendulum in this pic
Restoration only on that one. Sending in?
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
ok, I have a vintage seth thomas exeter-e clock and I’ve had it plugged in for quite a while, today when I walked into my room (which is where it’s plugged in, of course) I heard a rather loud noise, one that had never been there before. it’s a higher pitch than the sound the electricity moving through it makes (or maybe that’s the gears moving I’m not sure) and it’s much louder, not something I can just tune out, and it’s a constant noise. I’ve unplugged it but when I plug it in the issue persists. I’ve unscrewed the back plate off to see the inside to see if I could see any immediate problems, but I’m not a mechanic. I would upload a video if I could but the site doesn’t allow for it.
TL;DR – seth thomas clock is making new loud constant noise, please help.
The motor / movement is giving out and is no more. Its not made anymore either. Not much to do but get a new clock.
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
hello. I have a slate clock with a round movement I believe is seth thomas. it is stamped 812 and the build is 5 11. I need a suspension spring for it what movement may I have please?
These, cut / bend / modify to fit. Three chances to win
https://www.clockworks.com/product/clock-pendulum-suspension-spring-rods
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
I picked up a beautiful Seth Thomas today at an estate sale and am trying to figure out what size key I need.
It doesn’t have a movement type stamped in the back, but it does have an ink stamp of ‘4702’ on the door, and then on the right side of the movement back plate there is another stamp of ‘4702’ and then directly above that is ‘4506’
Is this from 45 or 47? And what kind of movement is it? And most importantly what key do I need for winding and time keeping adjustment?
ST loved size 7 key, but not every time
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
I have a Seth Thomas Rapture alarm clock that needs a new movement. Current one was made by Rythm Watch co.
No longer made.
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
I have a ST A205 mantle clock. It is stamped 5810 and there is an inscription on the movement D066-94. Can you tell me a little bit about the clock? It keeps good time and strikes on the hour and half hour. I wind it every Saturday morning, and am good for the week.
Hermle unit in disguise as ST, German made time and strike made about 40 years ago
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
Thanks for the information. I did see the Germany stamp in the wooden case. The clock was given to me by my grandmother about 40 years ago, and she had it in her living room for years before that. I remember listening to the clock strike when I was young and being fascinated by it. I am now 73, so I am wondering about your comment of the piece being made only 40 years ago.
If a German made ST, it was made on or after 1968
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
James, your knowledge of clocks far surpasses mine, as I’m new to the hobby of collecting and repairing them. But I’m unsure whether your statement about the timing of German ST’s is accurate. I have a Brookfield 5W with an A205-001 movement marked “Made in Germany for Seth Thomas Clocks”. The movement is also stamped with a 5610 code (October, 1956?). The clock label is stamped “5805” (May, 1958?). And that label shows addresses for “Seth Thomas Clocks Division of General Time Corporation” in “New York 13, N.Y.” and “San Francisco 5, Cal.” That are old USPOD “postal zones”. They were replaced when the U.S. Zip Code system took effect in 1963. Even allowing for the possibility that the company took some time to use up its inventory of old-style labels, my impression is that this clock was manufactured in the late 1950’s. This seems consistent with another author’s statement that “In 1955, a flood badly damaged the Seth Thomas factory. They phased out movement manufacturing and began importing many movements from Germany. Hermle, in the Black forest of Germany, has made many movements for Seth Thomas clocks.” https://www.clockguy.com/SiteRelated/SiteReferencePages/SethThomasHistory.html
Thanks for the wealth of information you provide us all. I hope this tidbit is useful.
Thank you
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
I just purchased a Seth Thomas Mantle Clock Westminster Chimes w/Calendar & Moon Phase without any instructions. Attached are two photos of front/back.( sorry, only allowed one attachment on your email setup)
Questions:
1) How to you adjust speed?
2) how to set the correct date, day of week, and month on the small dials?
Much appreciation……Ken
Up with the pendulum bob is faster, reverse is slower, by turning the nut on the bottom
Date / week / month are set by just turning it with fingers to whatever is correct
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
James
Thank you.
But no pendulum, just rotating horizontal balance wheel( here is rear view)
What about the small port around one o’clock number( smaller than the 3 larger ones which the key turns)—does this regulate the speed?
Really appreciate your expertise…………..Ken
That small weight on the top of the balance wheel, and its fingers that go to rub the wheel, all this slides toward the plus sign or minus to slow or speed time.
That movement is still made today, that one is the old style it maybe time to replace the movement if giving issues. These units are 25 year movements at best typically and now have a new balance style for ease of time adjusting.
That style is not easy to get to time perfect so they changed the design
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
What about the small port around one o’clock number( smaller than the 3 larger ones which the key turns)—does this regulate the speed?
= no, not sure what that does. Maybe it is another way to set the date
These calendar units are not as common, maybe sell one in a years time. I forget what that does.
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
I have a Seth Thomas Windham Strike, Catalog number 1762A, Model number 1762-001, movement number A036-016 840. Do you have a replacement movement for this? Thanks for your help!!
That clock is no longer made, we can restore the movement instead. The clock is nice, it depends if you like the clock or not really. If we restore it, it will remain a true antique and preserved. We can clean / oil / inspect the movement for only $200 and let you know how many bushings / pivot work so forth it needs and quote from there. If you are fine with the quote we will restore it to its fullness, if not liking the quote you get a cleaned and oiled movement back to you and know exactly what is up with it, for only $200 plus shipping. We would only need the movement alone and nothing else. No weights / dial / pendulum / hands needed.
We have the best tooling available, cleaning equipment, and cleaning solutions. There is no expense spared by us when it comes to having the best equipment. With this factor and 3 generations of clock repair expertise, you can rest assured your clock works will be in the best hands it can be in. We have three full time clock makers as well as an admin department to answer any questions you may have as well.
Please let us know if you are interested in this service by filling out the repair form at this link, https://www.clockworks.com/clock-repair-service.html because it would be an absolute pleasure to get this one shiny and working again.
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
Thanks for the reply! I like this clock very much so I’ll definitely be in contact soon. Thanks again!!
I have a seth thomas #102 mantel clock with no key. I have no idea what size to order
ST loved size 7
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
Thank You, I have 1 ordered size 7 from Clockworks,
I have a Seth Thomas #3 regulator by the Ball Watch Co. I recently moved and the movers lost the crank style key. My grandson just overwound the weight so it’s now jammed. So, two questions. I found a key for sale, for a #2 regulator. Will it fit? And, can I unjam the weight?
ST loved size 7 key, that is most likely the size. As far as the weight stuck, if adding weight temporarily so it works just until it comes down more usually solves. If cable driven / rope driven, be sure this did not jump off the spool it spins around, or not double crossing itself either.
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
I need a replacement for my Seth Thomas model 0678-000 24 hr. electric movement.
Any suggestions?
Obsolete, no parts available for that one
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
I need a new Seth Thomas movement to replace the Model 067B-000 24 hr movement I now have.
Any suggestions??
Obsolete, no parts available for that one
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
What can I replace it with?
Sad to say, nothing will fit up.
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
OK. Thank You.
I found a Seth Thomas bee hive or small cathedral clock, and bought it as a project, and it has ST 48 J stamped on the back. It will run for a little while and stop. What year, if known, was this made?
8 day American by Seth Thomas 1910 – 1940 about
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
need to replace a model 2468 seth thomas movement
What are the numbers off of the back plate of the clock movement itself? If it is hard to get to, usually you can stick a cell phone up behind the movement and get a picture of the numbers. Or through the side access panel if there is one.
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
Hello James,. I’m new to clock repair and bought a bunch of clocks to learn to fix. In that, there is a Seth Thomas Tambour clock with the strike spring broken. The work I believe is hermle but I cannot find what one it is. It is stamped d51m on the back. It’s a gong strike single hammer 1/2 and hour strike. Is there a list of the hermle movements that st used in the 50s? I looked at the Seth Thomas list but my numbers were not there. Any help would be great. thank you Eric
Says c51m im guessing the works are from 1951
No longer made, sounds like ST of USA in there last years.
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
That clock movement is a restoration only because it is obsolete
Are you interested in sending the movement alone and nothing else for restoration ?
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
Id like to repair it myself. Who made it? It looks german hermle. Is there a movement number for it? I cannot get info on it. Thank you for replying by the way
What are the numbers off of the back plate of the clock movement itself? If it is hard to get to, usually you can stick a cell phone up behind the movement and get a picture of the numbers. Or through the side access panel if there is one.
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
I have a Seth Thomas Adamantine Mantle clock (stenciled “0091”on the bottom, which I believe means manufactured in 1900?) It was my great grandmothers so the date would seem correct). It is missing the pendulum suspension spring rod (I have the pendulum bob). The mechanism is marked 3-5/8, which I understand is the “drop” or the distance from the center wheel to the bottom of the pendulum bob. Is that correct? I’m in search of a replacement pendulum spring rod, or if I can find a longer rod and modify it, provided I know how properly re-size it. Any help would be sincerely appreciated.
These
https://www.clockworks.com/product/clock-pendulum-suspension-spring-rods
Cut / bend / modify / adapt to fit
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
I have a vintage wooden cottage clock. The dial is marked with an S in a circle. Can you tell me the maker?
Sure looks like Sessions clock company 1910-1930 about
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
Thank you for the information. It is much appreciated.
was given a Seth Thomas parlor clock that is missing the pendulum bob. the movement markings are :
S. THOMAS
THOMASTON CT.
U.S.A.
Also a Dimond inside of a circle with the letters ST inside of the diamond. there is the numbers 5 7/8 stamped on it and under those numbers there is 1/2 stamped. clock seems to work fine and chimes correctly. would like to know what type of bob to find so I can proudly display and use it.
Thanks in advance.
The clock movement you have requires specific parts that are no longer manufactured or available. In such cases, a custom solution or modification to existing components would be necessary. Alternatively, we can try to find a match from our inventory of spare parts.
If you are considering restoring the clock, you can send it to us, and we will assess the situation and develop a restoration plan that includes addressing the parts issue. Are you interested in sending only the movement for restoration?
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
I am not really interested in restoring it as its value to me comes more from where I received it. I am also not to concerned that it keeps perfect time only that it is approximate. I also found that the hammer for the alarm gong has apparently broken off from the pivot as it is missing also. I would be interested in just finding a suitable replacement for both the pendulum bob and for the hammer.
Thank you for your quick reply.
Louis Rosales
The thing is, these parts cannot be bought new as described. They are either made or robbed from a junk unit.
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
Have a Royal Seth mantel clock from Thomaston. Hermle movement backplate is bumpy/pitted
and has movement number A403-102. Under this is the number 8106. Clock appears to be in very good condition, but seems to need either repair or a new movement to make it function. Cant find this movement in Clockworks list.
This is the same model that was ceremonially burned in 1943. Any advice?
It will end up being the 132-071 unit we offer at this link
https://www.clockworks.com/product/new-132-071-ships-bell-clock-movement
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
Did Seth Thomas hand inscribe an S and a T on the winding on in the inside?
Can anyone give me the year that the Hermle 350-060 movement dates from?
It is is my old Seth Thomas – I’m guessing early 1950s????
See the date code and this link to decode the age
https://www.clockworks.com/posts/hermle-movement-date-codes
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
I have a Seth Thomas Black Matte Quartz Seasprite II Ships Clock and would like to know when they were manufactured, and what the case material is and where it was manufactured. Model 1028G.
Thank you for any help you can provide.
What are the numbers off of the back plate of the clock movement itself?
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
It says: Cat.# 1028G (1028-007) Quartz Seasprite II, and then there are numbers running up the side of the tag that say: 021187, and the clock movement itself is just a standard Japanese quartz clock movement.
Thank you for your response!
Do not have that one, but here are some alternative options
For Time Only movements (No chime, No pendulum) See this link
https://clockworks.com/clock-movement/quartz-clock-movements-time-only.html
For High Torque movements that are time only (No chime, No pendulum) See this link
https://clockworks.com/clock-movement/high-torque-quartz-clock-movements.html
For Chime Movements or Pendulum Movement See this link
https://clockworks.com/clock-movement/quartz-specialty-clock-movements.html
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
Hello. I just received a Seth Thomas grandfather clock, that I believe is either 1960s or possibly late 1980s and trying to date. It has a German-made Jauch movement No A407-000. Under the stamped (into the plate) name “Jauch” there is the number 96 and on the printed label it says “Made in Germany for Seth Thomas; Thomaston, CONN, USA”. Any guidance would be appreciated. Thanks, Fred
Fred – ignore my post below – I missed the part that you said it was a Grandfather clock. I can not say how they were stamped. Sorry
Check what is stamped again Fred. The reason I say that is in 1950 Westclox and Seth Thomas mergerd under a holding company “General Time”. After that the back plates were reportedly stamped “Made in Germany for Seth Thomas a Division of General Time”. In 1970 Talley Industries did a hostile takeover of General Time and the plates were then stamped “Made in Germany for Seth Thomas a Division of Talley Industries”. In 1982 Talley ordered the closing of the Conneticut clockworks and moved everything to Athens, GA. IN 1988 General Time was bought back by stockholders – it went out of business in 2001. Colibri got the Seth Thomas stuff. It is now owned by Alliance Time and they are throwing the Seth Thomas name on everthing they can.
1970s most likely. Now obsolete but we have the conversion kit at this link
https://www.clockworks.com/product/jauch-pl93-clock-movement-kit
Although it is for a PL93, it will also work with the unit you have
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
I have a 1979 Seth Thomas grandfather clock and would like to know can I buy a replacement movement or could I clean and oil it?
What are the numbers off of the back plate of the clock movement itself? If it is hard to get to, usually you can stick a cell phone up behind the movement and get a picture of the numbers. Or through the side access panel if there is one.
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
My set thomas movement has an 89m on one part and a 90 on the other. Says Made in U.S.AMERICA.
There is a 0 stamped on the wood in back. Face says Set Thomas Senora Chime and there is an SF by the center hole. Sure wish it worked!!
Sorry to say that one is no longer available new. We can overhaul this one if you like, we only need the movement alone sent in. We can tell you how to remove it and reinstall it, help you along the way. When its done and installed it will run for years.
We start with this =
CLEANING AND OILING FOR ONLY $200
We have the best and most expensive tooling, cleaning equipment, and cleaning solutions. There is no expense spared by us when it comes to having the best equipment. With this factor and 3 generations of clock repair expertise, you can rest assured your clock works will be in the best hands it can be in.
For this unit, we will take the movement in, unpack it, and then clean it and inspect it for $200. If it passes inspection, we will oil it and test it. If this is all that is needed that is all it will cost is the $200 plus the shipping back to you. The initial $200 is non refundable and is the fee for the cleaning, inspection, and oiling and testing only. We do need to be paid for our time on this even if the clock movement is deemed unrepairable for some reason.
Please let us know if you are interested in this service by filling out the repair form at this link, https://www.clockworks.com/clock-repair-service.html because it would be an absolute pleasure to get this one shiny and working again.
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
I have an old Seth Thomas “Royal Seth” mantle clock – from the Talley years. It has a Hermle 1050-020 movement from my research. I cleaned the movement with a spray acetone electronics cleaner spray to remove the build up of old oil on it. (Looked like someone had sprayed it with WD40). I then lubricated it with Liberty synthetic clock oil. I ran it for a week prior to cleaning it and it actually kept good time. Now, it runs slow – about 5 min per day. The speed adjustment is all the way to + side. Any idea what could be causing it to run slow? I’ve worked on clocks before and always had good luck bringing them back to life – but I’m clocksmith. This is the first time this has happened to me.
It was shot before you started, these are 30 year units at absolute best, yours is closer to 50
Please order the 1050-020 from this link
https://www.clockworks.com/product/new-1050-020-clock-movement-by-hermle
These are not worth the fight chasing the used one
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
Thanks James. I suspected.that would be the answer!
Where can I find the correct hand nut for Hermle A206-012 (Seth Thomas 1209)
German hand nuts this link
https://www.clockworks.com/product/german-clock-hand-nuts
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
will these fit the Hermle 131-030 movement?
No, best to get the 131-030 from this link
https://www.clockworks.com/product/new-131-030-clock-movement-by-hermle
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
I have a ST 120-J movement in a banjo clock. It has three marks on the movement plate; 120-J; 11-40; and 4 41. The first is obviously the model number. What do the other two marks indicate?
Those are just internal engineering codes for ST themselves and have not much relevance to anything needed to be concerned about with the end user
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
I have a family owned Seth Thomas Exeter-W 8 day model E 538-001, A206. The label states made in Thomaston Connecticut. My Daddy died in 2000 and he was the clock lover. The set knob location “A” in the center of the back of the clock is missing its knob. Is it possible to buy that replacement knob? The set knobs on either side of it are there, solid metal and each one feels like they are wound but the clock will not run without the center set knob. Is it possible to get a replacement for that know A? I was born in 1958 and know this clock has been around all my life, so it is important to me.
No replacement for that antique ST made today.
Do not have the knob, sorry to say
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
Hello – I am trying to help my elderly uncle get the time and chime synched on his old Seth Thomas mantle clock. The number on the movement is 63194. At 2:00, it chimes 12 times. Do we turn the hands backwards or do something else to get in corrected? Any help much appreciated. Gail Havens
At 2:00, it chimes 12 times.
= Hour hand is only a friction fit. Turn the hour hand to the 12 and set to time with the minute hand.
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
Hello,
I have a SETH THOMAS #A208-005 7003 that runs fast after fully winding… Gains about 3mins every hour.. it will slow down after a few days of running but speeds back up when the 8day comes around and it is time to wind again. I have been trying to find a clean picture of the balance wheel because i can not seem to locate the tabs above the wheel to adjust to slow the clock down. do you happen to have a pictre i can use? or have any idea what the tabs look? or instructions on how to adjust? Any help would be great thanks in advance for your support.
Timing a balance clock movement
Balance Clock Movement Timing is done fairly easy. There are three types of clock balance movement styles post 1950. This section is for those balance units that do not have a platform escapement.
The platform escapement can be read about in another section. These notes are only for the larger balance wheel in the top center of the clock movement.
For example, movements in the Urgos 6/ series and many of the Hermle clock movements. Hermle movements such as 340-020 and 350-020. Out of these, two styles, the old style and then the new style.
Use of the old style was all through the 70’s and 80’s and 90’s. Around this time there was a switch to the new style on the Hermle units. By this time the Urgos units were out of production.
The old style
The old style is one with a round spring that goes up and down (Vertical). It goes in a circle around the center arbor of the balance wheel. In this style there is a slide arm with a tiny weight on the balance wheel itself. There is a + and – on the wheel. To speed up time go towards the plus sign.
However this style is not always easy to regulate and can be very hard to get it perfect. The factory has special devices to make it perfect. However it’s not that easy on the customer end with this style balance. For this reason it has been improved upon during future manufacturing.
If the old style balance then the clock movement has some age to it. If this is the situation it is just best to replace the unit with the new one. Clockworks offers the movement brand new with the new style balance for less than the cost of a cleaning.
The clock movement has lasted 25 years or more. In theory the new unit should last more than this with the improved aspects.
The new style
The non pendulum units offered on this page all have the new and improved balance assemblies. Despite the change on the balance, these units are a direct fit and will install in the clock case the exact same way as the old unit.
If the numbers match from the old unit to the numbers offered on this page, than the movement will be the exact same. It will be the same as it is now but brand new and with the improved balance.
The improved upon balance units have a different kind of hairspring (Horizontal). It will also have a screw to regulate it rather than a slider arm. The regulator screw is on the back of the movement near the balance.
There is a + and – sign next to it meaning fast or slow. If the clock needs to be faster to keep time then the screw would be turned to the plus and opposite for slowing time.
The factory times the balance movement before the new movement ships. The movement has a slider arm on the threaded portion of the timing adjustment screw. This arm pulls or pushes the horizontal hair spring and makes the clock run faster or slower.
When the movement leaves the factory this arm is in the center of that threaded rod and is timed while the arm is at that location. During shipping it is possible for this arm to jump out of its center position and, in turn, make the timing out of whack.
The solution to this is to first just lift that timing arm with fingers and move it to the center of the threads again. This is where timing begins.
After it is in the center of the threads it will be pretty close in timing and only will need fine adjustment with the screw, moving it too the plus sign for faster, minus sign for slower.
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
I have a Seth Thomas, 8 day, quarter hour chime mantle clock, and I’d like to know if anyone could date it. Its in excellent condition.
What are the numbers off of the back plate of the clock movement itself? If it is hard to get to, usually you can stick a cell phone up behind the movement and get a picture of the numbers. Or through the side access panel if there is one.
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
Hello!
I have the same question.
The logo on the plate (which is smooth) is ST in a diamond within a circle (upper left). On the lower left is the number 89J.
The label is shot except for part of the word Sentinal an what I believe is part of a 7.
The hands have an S and a T at their bases (S on min a T on hour).
I picked this up at (of all places) a car junk yard and it’s in pretty sad shape. I’m trying to decide if I should leave it be (is it special…or more special) or if I can be comfortable repairing the case myself.
That one is a true Seth Thomas made in CT USA, an 8 day time / strike spring driven unit made 1930s – 1940s mostly.
Should the case be fixed? Up to you, not sure from here
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
This is more of a comment as I just came into an OB McClintock bank clock that was turned into a Grandfather clock of sorts. I have a friend that works on clocks and he just basically cleaned and oiled the movement which is a Seth Thomas 85A, he says 1917. My wife saw it an estate sale down the road. The clock has been running over a month now and keeps perfect time. It looks original ( aside from the added base ) with the stained glass door and 2 locking mechanisms for the door. It used to have electricity hooked up to it to run the banks chimes which were separate. Enjoying your website.
Thanks for sharing Paul !
Sounds nice
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
I have a brass quartz rapture seth thomas desk clock. The movement simply says Rhythm Watch Co and does not have the identifying numbers you discuss. Any way to identify this and order a new movement?
Sorry do not have that one
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
Hi! I have just picked up a clock that my great-grandmother had this are the Letters and numbers I see. SETH THOMAS
4471 1194 403 015 26 – I don’t really have a clue what this means.
Is it possible to share how did you arrive at that conclusion with just numbers.
These numbers = 403 015
With this chart =
https://www.clockworks.com/clock-movement/seth-thomas-clock-movement.html
Is this movement
https://www.clockworks.com/product/new-451-050-clock-movement-by-hermle
Or this one
https://www.clockworks.com/product/new-451-053-clock-movement-by-hermle
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
Thank you.
Seth Thomas post 1950 with German movement, chain driven, three weights, 8 day, westminster
What else do you need to know about it?
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
Can you date a movement for me? On the frame there us an ST ,inside a circle and diamond. It also says Made in US America. Also a 16 stamped on frame. The case is Marsh Gilbert , circa 1830 , originally with wooden movement.
Thank you.- Jeff
Prior to 1950 is all I know from here
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
I NEED TO FIND A SHOP THAT CAN RECONSTRUCT MY GRAND FATHER CLOCK I WAS TRYING TO REPAIR IT BUT WAS UNABLE TO PUT IT BACK TOGATHER
We can certainly help with this one. Please ask this same question and include pictures, to clockworks@clockworks.com
We also need to know your location in case it ends up we need to come out
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
how do I remove weights from clock
There is no trick to this, just unhook them and remove
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
Hello James, I am a collector of ship’s clocks from Germany. I have purchased an old Seth Thomas ship’s clock and would like to repair it. Can you tell me how old the clock is? The seller told me the watch came from his family and was from around 1880. Thank you Bernd
Hi,
Not sure really on that one but it will be after 1853 and before 1932, so it maybe is accurate when saying 1880
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
Hi James I read your pages on ST clocks. I have a ST antique regulator that is stamped 45N of the back. I cannot find the key What size key would be most likely to fit?
Thanks
Usually size 7
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
I have a Seth Thomas grandfather clock. It has a Franz Hermle 451-050 H 85cm/70.777 movement. The letters AD is stamped above the Franz Hermle name. It says NO (0) Jewels, unadjusted and Made in Germany. The only other marks on the clock is a white tag with the number 987. The clock has 3 weights. How can I tell about how old my clock is?
By you saying ST Hermle, puts that movement over 45 years old as that is how long ago Seth Thomas worked with Hermle.
Time for a new one.
Please order the 451-050 85cm from this link
https://www.clockworks.com/product/451-050h-hermle-clock-movement
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
How do I get a Seth Thomas clock started after it has been in storage for 40 years? It is a Country Cottage model with Catalog Number 1209 (1209-000). Movement is A206-012. See attached pictures for clarity. I look forward to your reply and thank you very much.
John
Thank you for your interest, here are the instructions for the installation of your new spring driven clock movement. Please follow these instructions, and if you get stuck after using these instructions still, just contact us and we will work through whatever your stuck on.
Here is the link
https://www.clockworks.com/spring-driven-clock-instructions.html
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
I live in Australia. I have two Seth Thomas wall clocks which I bought at auction 32 years ago. Both have run flawlessly until recently. I know nothing about them but I believe they are antique. The Octagonal railway/school wall clock looks to be the older of the two and recently stopped running. It is marked ST surrounded by a diamond and an outer circle. It is followed by the inscription “MADE IN THE USA AMERICA”. Bottom left it is also marked below the winder 8 1/4.
I have removed the movement from it’s case. The only other mark I found anywhere was a pencil incription on the back of the case KE958?
Can anyone tell me the age of this Seth Thomas clock? I’m thinking first decade of the 20th century? I would like to be able to find a replacement escape wheel (40 tooth approx 32mm diameter) plus the correct Verge for the clock. Thank you so much for any help you may be able to provide
It would be made between 1850 and 1940.
The only way to correct the escape wheel is to get a junk movement for parts, or correct the one that exists.
No parts are made for that unit.
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
Antique Seth Thomas Clock No. 296B
Hi,
Sorry to say that one is no longer available new. We can overhaul this one if you like, we only need the movement alone sent in. We can tell you how to remove it and reinstall it, help you along the way. When its done and installed it will run for years.
We start with this =
CLEANING AND OILING FOR ONLY $200
We have the best and most expensive tooling, cleaning equipment, and cleaning solutions. There is no expense spared by us when it comes to having the best equipment. With this factor and 3 generations of clock repair expertise, you can rest assured your clock works will be in the best hands it can be in.
For this unit, we will take the movement in, unpack it, and then clean it and inspect it for $200. If it passes inspection, we will oil it and test it. If this is all that is needed that is all it will cost is the $200 plus the shipping back to you. The initial $200 is non refundable and is the fee for the cleaning, inspection, and oiling and testing only. We do need to be paid for our time on this even if the clock movement is deemed unrepairable for some reason.
Please let us know if you are interested in this service by filling out the repair form at this link, https://www.clockworks.com/clock-repair-service.html because it would be an absolute pleasure to get this one shiny and working again.
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
AWI / BHI / Lifetime NAWCC
I am looking for a replacement movement or parts for a Seth Thomas marked 4 5/8. Any ideas on a part number?
Hi,
Whatever it is it is required in parts for that clock movement is no longer made or available.
Something custom would be made or modification to that what does exist. Or we would need to match it up to one of our own parts units.
If you would like to send it in for restoration, we could figure it all out here, along with the restoration process.
Are you interested in sending the movement only?
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
AWI / BHI / Lifetime NAWCC
I have a 1960’s grandmother clock with three winding holes. Is it possible to not wind one of the holes and silence the chimes?
Yes
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com