Clock Movements

How to find the movementWhy a new clock movement?What happened to the old one?Hermle Movement Availability

The first step is to identify the country of origin of the mechanical clock movement. If the mechanical movement is stamped made in Germany or West Germany, then the availability of this is much higher and we can help with a new one usually.

If the clock is made in any other country such as USA, France, Korea, or China, then you need to contact us via email with pictures of the movement to [email protected] so we can try to help with either a repair or replacement.

If you do have a German unit you would need the numbers off of the back plate of the movement itself, right off the brass back plate.

The numbers on the back plate of the brass movement tells us everything about the Mechanical Clock Movement. Although it may not say the manufacturer on the movement, the numbers will give us this information.

The movement numbers usually tells us the way the clock chimes, where the chime hammers are located, if it's weight or spring driven and much more. So with the movement numbers we can have a replacement clock movement that is not a knock off version, it is the same movement that was made the same as the old one. Usually all the old parts such as the clock weights, pendulum and hands will all work with the new movement, as the new one will be the exact same thing as you're old movement. mechanical clock movement identification

Using the examples below, narrow down the manufacturer of you're movement and go to that clockworks.com web page to order. When you get to the proper movement on the website, do not worry if the picture is not exactly the same as what you have. The matching of the mechanical clock movements number is what makes the difference. If the old movement number matches the one on the list, then you will get that same movement.

  • Less cost than a cleaning
  • Last 25-30 years
  • Easy to install, we can help/li>
  • Ships same day as order

A new mechanical clock movement can ship from USA the same day you order it, so the time it takes you to get you're clock up and running is very short. A repair can usually take months and then you are still left with a used overhauled movement rather than a new one.

When you receive a new movement it is the same as you're old movement, so all clock components will fit on to the new movement. The cost of a new movement is usually the same if not less than a cleaning on the old unit, and when it's installed it should last another 25-30 years without thinking about replacing or servicing it again. Some new units have bronzed bushings in key wear areas to increase the life of the movement, and on the non-pendulum units the balance has been improved upon for longer life and ease of timing. We here at Clockworks offer only the highest grade mechanical clock movements and they come with a 2 year warranty.

With age, the mechanical clock movements oil solidifies and becomes black and sticky. By the time 20 or 30 years go by, the oil has solidified and is creating wear on the movements brass plates.

If you look at your old clock movement, you will see holes in the brass plates where there are small pivot arbors sticking into these holes. These pivots are what the gears of the clock ride upon and as the pivots spin in the solidified oil, this makes the holes oblong instead of round. With the pivot holes oblong, the holes are pinching the pivots and creating resistance in the gear train. With the solidified oil and the pinched pivots, the clock will eventually stop working or chiming.

This wear takes place in the holes that are in the brass plates and is hard to identify sometimes. These holes in the brass plates become oblong instead of round and this pinches the pivot arbor going into it. Between this, and the solid oil, the clock ceases to function. To have this repaired is an expensive and long process. To have a mechanical movement serviced can cost hundreds, if not over, a thousand dollars and in some cases it can take weeks or months to complete it.

The availability, at this time, is excellent. We stock all Hermle Clock Movements, with very few exceptions. Some special CM lengths may be a special order.

If it's not on the charts then it most likely will have to be made up special for an extra $30. This is a special order so please call it in.

Hermle is one of the biggest movement producers in the world today. Not only do they have the most movements being made, but they also have the best part availability when you need a component such as a pendulum or a dial, or a complete clock kit.

A Hermle Clock Movement generally lasts 25 to as much as 40 years. We usually get calls to replace units that were built in the early 80's or late 70's.

If you look at the back plate of the movement, you will see a couple of numbers above all the other numbers. You will see a number such as a 77 or an 83 or so on. This is the date the movement was built.

Replacing these units rather than getting them cleaned and oiled is usually the smart way to go as it has been factory improved, brand new, factory lubricated, easy to install, and it will cost less than a cleaning. Keep in mind however, that there are different grades of the same movement number. Some are cheaper, but they contain plastic parts.

The Hermle units that we offer here at Clockworks are the best grade available with no plastic components for a very reasonable price. The movement number has three or four numbers, then a dash, and some more numbers, then a CM length underneath it if there is a pendulum.

They are all consistent as they always have the numbers, then a dash, then more numbers. Basically if there is a dash in the movement number, and it's all numbers in the beginning with no letters like "A", it's a Hermle unit for sure. If there is an A before the number then it can still be a Hermle, but with the Seth Thomas name and numbering system.

On the back plate of the clock movement you will see the numbers such as 451-050 94cm. These numbers let us know everything we need to know about the mechanical clock movement itself. This tells us if the clock is weight driven or spring driven, if it has a pendulum, the size of the movement and the length of the hand shaft and much more. To match up the numbers to the new movement numbers is to get the exact same movement you have now but brand new. Since the new movement will be the exact same and not some knock off imitation, all of your existing clock components will usually fit just the same as the old unit.

Assistance = 800-381-7458

Hermle mechanical clock movement identification

Hermle Movement Availability

The availability, at this time, is excellent. We stock all Hermle Clock Movements, with very few exceptions. Some special CM lengths may be a special order.

If it's not on the charts then it most likely will have to be made up special for an extra $20. This is a special order so please call it in.Read More »

Hermle is one of the biggest movement producers in the world today. Not only do they have the most movements being made, but they also have the best part availability when you need a component such as a pendulum or a dial, or a complete clock kit.

A Hermle Clock Movement generally lasts 25 to as much as 40 years. We usually get calls to replace units that were built in the early 80's or late 70's.

If you look at the back plate of the movement, you will see a couple of numbers above all the other numbers. You will see a number such as a 77 or an 83 or so on. This is the date the movement was built.

Replacing these units rather than getting them cleaned and oiled is usually the smart way to go as it has been factory improved, brand new, factory lubricated, easy to install, and it will cost less than a cleaning. Keep in mind however, that there are different grades of the same movement number. Some are cheaper, but they contain plastic parts.

The Hermle units that we offer here at Clockworks are the best grade available with no plastic components for a very reasonable price. The movement number has three or four numbers, then a dash, and some more numbers, then a CM length underneath it if there is a pendulum.

They are all consistent as they always have the numbers, then a dash, then more numbers. Basically if there is a dash in the movement number, and it's all numbers in the beginning with no letters like "A", it's a Hermle unit for sure. If there is an A before the number then it can still be a Hermle, but with the Seth Thomas name and numbering system.

Keininger mechanical clock movement identification

Kieninger Movement Availability

Kieninger mechanical clock movements are available usually with no problem. The 5 tube mechanical clock movements are no longer made but the rest is usually in stock.

Kieninger clock movements are sometimes a bit tricky to tell what the actual number is. They give part of the numbers but then it is up to you to use the chart to figure out the rest of it. This would depend on if the movement is chain driven or cable, the pendulum length and so on.


Urgos mechanical clock movement identification

Urgos Movement Availability

We only have floor, weight driven mechanical clock movements by Urgos at this time. The factory was purchased and that is all that they are making. Read More »

If the clock movement is spring driven, then email us the movement numbers and we will see what we can do with a Hermle mechanical clock movement that is close to what you have.

Seth Thomas mechanical clock movement identification

Seth Thomas Availability

The Seth Thomas name is on everything now a days. If someone says I have a Seth Thomas, that could mean a clock movement that takes a battery or a mechanical movement or anything really. Read More »

>Back in the old days, there was a company who sold many mechanical clock movements out of Plymouth Hollow, CT and so they changed the name of the town to Thomaston, CT after the company.

So now if the clock is very old and made in the USA with an ST marking in a diamond shape, then that is an original Seth Thomas and there would be no replacement movement for this. you're only option is to get this repaired.

If the Seth Thomas mechanical clock movement says made in Germany, then use our list to see what the real clock movement numbers are so you can price it out and order it. The thing is, the company did not produce any modern clock movements however there name is marked on them as their own. So if the clock says Seth Thomas but it was produced after around 1960, then it is made by someone else with the Seth Thomas name.

So if someone were to purchase a Seth Thomas clock as an original Seth Thomas, and it ends up being produced by a different company, is it really a Seth Thomas clock? Yes and no, it is a true Seth Thomas as it did come from who ever owned the rights to that name at that time, but the movement may not be actually produced by the Seth Thomas clock factory in Connecticut back in the day, as this is how we like to think of the ST name.


Jauch mechanical clock movement identification

Jauch Movement Availability

The Jauch clock company is no longer in business and nothing is available new. Since these are no longer made, we may be able to help with a Hermle mechanical clock movement retrofit instead. Read More »

If the movement says made in Germany and there is not much information on it but just numbers similar to the ones listed, and it's chain driven with a wood stick pendulum, then it is a Jauch mechanical clock movement that we can usually provide a retrofit for.

Mason and Sullivan mechanical clock movement identification

Mason and Sullivan Availability

Mason and Sullivan did not make any clock movements. They purchased so many mechanical clock movements from the manufacturers and were able to have their name put on their movements with their numbering system. Read More »

You would need to go to the Mason and Sullivan page and look up the M+S movement number, and then you will see the real movement number from the true manufacturer where you will be able to order.

Hermle Decoded

Mechanical Clock Movement Identification by Clockworks.com
Hermle Clock Logo from Clockworks.com
Mechanical Clock Movement Identification by Clockworks.com

Date Code Explanations

Hermle clock movement date codes are explained in this section. This is so you know when the movement was made and decide if the clock has lifed its life and its time for a new one. After figuring out the date code, figure out how old it is so you can justify the purchase of a new one with ease. If your clock is over 20 years old, replace it. If the clock is under 20 years old, consider fixing it instead.

Early movements prior to the year 1987 have just the stamp of the year on the back of the clock movement, 81 just means 1981.

From 1987 on, they used letter codes instead of numbers to represent the year made. Such as the year 1987 is only marked with the letter A instead, and 1988 is the letter B.

Letter Code Definitions

This section explains the letters that sometimes come after the movement numbers on a Hermle clock movement.

These letters often can be ignored in replacing a movement with us, we offer movements by the features instead. The letters on the new movement may or may not be the same on the new one, but you need not concern yourself with this. The features of the movement would be the same, such as if you had a second bit before and the movement number did not have an S, but the new one does have an S.

  • DB = Dead Beat
  • CS = Small Suspension -OR- Seconds and Made in Germany
  • C = Engineering Code
  • D = Engineering Code
  • K = Calendar -OR- Made in Germany
  • S = Seconds -OR- Kit Format 132-071
  • SE = Swiss Escapement
  • N = Low Bridge
  • H = High Bridge
76 = 1976 77 = 1977 78 = 1978 79 = 1979 80 = 1980 81 = 1981 82 = 1982 83 = 1983 84 = 1984 85 = 1985 86 = 1986
87 = 1987 A = 1988 B = 1989 C = 1990 D = 1991 E = 1992 F = 1993 G = 1994 H = 1995 I = 1996 J = 1997
K = 1998 L = 1999 M = 2000 N = 2001 O = 2002 P = 2003 Q = 2004 R = 2005 S = 2006 T = 2007 U = 2008
V = 2009 W = 2010 X = 2011 Y = 2012 Z = 2013 AA = 2014 AB = 2015 AC = 2016 AD = 2017 AE = 2018 AF = 2019

Hermle movement number starts with....