Mechanical Clock Movement Identification

IdentificationIdentify the MovementWhy get a new movement?What Happened?Hermle Availability

Please view these information tabs to determine the Identification of the Mechanical Clock Movement .

Identifying a mechanical clock movement

To get anything for a clock movement from Clockworks we first need to know what the movement is. This is done by decoding the identification markings on the back plate of the movement itself. By knowing what the movement is, you can replace it with a new one. Subsequently, you can purchase parts such as a pendulum. It is very difficult to provide a pendulum or a dial to a movement without knowing what it is.

The content of this website is copyright by Clockworks and written by James Stoudenmire

New Clock Movement Benefits

New clock movement benefits far outweigh the benefits of an overhaul. This section will explain why that is and what the best course of action is to get your clock working.

Getting the movement worked on

Clocks need to have fresh oil after 10 years or so. Then, after 20 or 30 years, a full break down of the movement is necessary. This is all well and good and can be done with the old movement. The movement will run for another 5 or 15 years with no issues but then it will be time to do it again. So obviously this is a new clock movement benefit.

The content of this website is copyright by Clockworks and written by James Stoudenmire

Mechanical Clock Movement Wear

Mechanical clock movement wear after years go by because the oil turns solid. With age, the mechanical clock movement's 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 brass plates of the movement. So, when this happens, the clock movement will not run correctly. This is when the movement will need a cleaning or be replaced. Of course, a brand new movement is always your best option.

What wear and where

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.

Invisible clock movement wear

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 two times as much or even three times the amount of the new one. However, once the movement starts having problems due to the oblong pivot holes, something will need to be done. The clock will never stay running otherwise.

The content of this website is copyright by Clockworks and written by James Stoudenmire

Hermle Mechanical Clock Movement Availability

Hermle Mechanical Clock Movement Availability 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 we may still have it, just contact us. You can call or email a picture to us. If a CM option is not in the list, we can still make it up special for you.

Who is Hermle?

Hermle is one of the largest movement producers in the world today. Not only do they have the most movements being made, but they also have the best part availability. This is good for 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.

The content of this website is copyright by Clockworks and written by James Stoudenmire

Mechanical Clock Movement Identification Assistance = 800-381-7458


Hermle movement availability

Excellent availability and all Hermle mechanical clock movements. All units are in stock with very few exceptions. A certain pendulum CM length that was available in the past may not be available off the shelf however. This would be called a regear and we would separate the plates and alter the CM length to match the old unit if required.

Hermle identification

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.


Kieninger movement availability

Most Kieninger mechanical clock movements are available and in stock. Some fluctuate from not being made to being made such as the H series. Other units are no longer available such as the popular 5 tubular bell Grandfather unit and repair is the only option.

Kieninger identification

Kieninger clock movements are sometimes a bit tricky to tell what the exact movement is. The movement provides only part of the movement identification and then it is up to us to use the chart to figure out the rest of it. This narrowing down to the correct movement by selecting if chain driven or cable, the pendulum length, and so on.


Urgos movement availability

Three weight floor clock movements are still being produced only. The rest of these units are obsolete and no longer available new. Often a conversion can be put together to enable a movement made by Hermle to be used instead in this situation.

Urgos identification

Narrowing down a three weight Urgos clock movement can get complicated as the movement numbers change every production run. What used to be called a UW32/1 is not called a UW32319 and so on. This is described better on the Urgos page and can be pulled up by clicking the picture.


Seth Thomas Availability

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 company did not produce any modern clock movements however their name is marked on them as their own. If the clock says Seth Thomas but it was produced after 1960 it is made by someone else with the Seth Thomas name.

Seth Thomas identification

The Seth Thomas name has been sold many times and the name could be on any style of clock case. The ST name can be seen on battery movements, novelty clocks, German mechanical units and so on. If the clock is very old and made in the USA with an ST marking in a diamond shape it is an original Seth Thomas. There would be no replacement movement for this and the only option is to get it repaired.


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.

Jauch identification

Jauch clock movements have little identification markings to go by. Often it will be as simple as a 77 or 78 before some other numbers. It may only say PL 77 or PL 116 also. If the movement says Jauch and some other numbers, it is the Jauch clock movement company who made it.


Mason and Sullivan availability

Mason and Sullivan did not make any clock movements themselves so their Mechanical Clock Movement Identification is a bit different. They purchased an abundance of mechanical clock movements from manufacturers and were able to have their name put on the movements with their own numbering system.

Mason and Sullivan identification

The Mason and Sullivan page is needed to look up the M+S Mechanical Clock Movement number. This chart will help find the real Mechanical clock movement number from the true manufacturer.

Hermle Movement Date Codes

Hermle Movement Date Codes

Date Code Explanation

Hermle movement date codes are explained in this section. This is to know when the movement was made and decide if the clock has lived its life and is time for a new one. After finding the Hermle movement date code, it can be figured out how old the clock movement is. If the clock is over 20 years old it is time to replace it. If the clock is under 20 years old is the only time to consider fixing the movement instead.

Hermle date code change

Prior to using Hermle movement date codes, early movements before 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 1988 is only marked with the letter A instead, and 1989 is the letter B.

Letter Code Definitions for

This section explains the letters on the Hermle movement date code that sometimes come after the movement numbers on a Hermle clock movement. These letters often can be ignored when replacing a movement with Clockworks. The Hermle movement date code letters on the new movement may or may not be the same on the new one but this is not a concern. The features of the movement will be the same, such as if there was 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 = 197677 = 197778 = 197879 = 197980 = 198081 = 198182 = 198283 = 198384 = 198485 = 198586 = 1986
87 = 1987A = 1988B = 1989C = 1990D = 1991E = 1992F = 1993G = 1994H = 1995I = 1996J = 1997
K = 1998L = 1999M = 2000N = 2001O = 2002P = 2003Q = 2004R = 2005S = 2006T = 2007U = 2008
V = 2009W = 2010X = 2011Y = 2012Z = 2013AA = 2014AB = 2015AC = 2016AD = 2017AE = 2018AF = 2019
Hermle Clock Movement Identification
Hermle Clock Movement Identification
Hermle Clock Movement Identification
Hermle Clock Movement Identification