Hermle Movement Date Codes: How Old Is Your Clock?
Have you ever looked at the back of a Hermle clock movement and wondered what all the stamped numbers and letters mean?
Along with the movement model number, pendulum length and other manufacturing information, many Hermle mechanical movements include a date code that identifies the year the movement was produced. Once you know where to look and how Hermle’s coding system works, determining the age of the movement can be surprisingly simple.
This guide includes a complete Hermle movement date code chart from 1976 through 2026, along with tips for identifying the correct marking and avoiding some common mistakes.
Where Is the Date Code on a Hermle Movement?
The date code is normally stamped into the back plate of the mechanical movement. You may find it near or above the Hermle trademark, the FHS logo or the movement identification number.
Depending on the clock case, the marking may be difficult to see directly. A cellphone camera can often be placed behind the movement to take a clear photograph without removing anything from the clock.
Before looking inside the case, stop the pendulum and avoid touching the gears, levers, chime hammers or other moving components. There is usually no reason to remove the movement simply to find its identification markings.
A typical Hermle back plate may include several different pieces of information:
451-050 – The movement model number
94 cm – The approximate pendulum length for which the movement was designed
Franz Hermle, FHS or Hermle – The movement manufacturer
A separate number or letter – Often the manufacturing date code
Hermle Date Codes Before 1988
Hermle used two-digit numerical date stamps on many movements produced through 1987.
For example:
76 means 1976
81 means 1981
87 means 1987
Beginning in 1988, Hermle changed to an alphabetical date code system.
Hermle Letter Date Codes Beginning in 1988
The alphabetical system began with:
A = 1988
B = 1989
C = 1990
The sequence continued through the alphabet until:
Z = 2013
Beginning in 2014, Hermle continued the sequence using two-letter codes:
AA = 2014
AB = 2015
AC = 2016
The sequence has continued one letter at a time, with AM representing 2026.
Complete Hermle Movement Date Code Chart
| Code | Year | Code | Year | Code | Year |
|---|---|---|---|---|---|
| 76 | 1976 | C | 1990 | Q | 2004 |
| 77 | 1977 | D | 1991 | R | 2005 |
| 78 | 1978 | E | 1992 | S | 2006 |
| 79 | 1979 | F | 1993 | T | 2007 |
| 80 | 1980 | G | 1994 | U | 2008 |
| 81 | 1981 | H | 1995 | V | 2009 |
| 82 | 1982 | I | 1996 | W | 2010 |
| 83 | 1983 | J | 1997 | X | 2011 |
| 84 | 1984 | K | 1998 | Y | 2012 |
| 85 | 1985 | L | 1999 | Z | 2013 |
| 86 | 1986 | M | 2000 | AA | 2014 |
| 87 | 1987 | N | 2001 | AB | 2015 |
| A | 1988 | O | 2002 | AC | 2016 |
| B | 1989 | P | 2003 | AD | 2017 |
| AE | 2018 | AI | 2022 | AM | 2026 |
| AF | 2019 | AJ | 2023 | ||
| AG | 2020 | AK | 2024 | ||
| AH | 2021 | AL | 2025 |
Do Not Confuse the Date Code With the Movement Number
One of the most common mistakes is assuming that every letter stamped on a Hermle movement represents its production year.
It does not.
A Hermle movement number may contain a letter or several letters describing a particular version, production run or mechanical feature. Examples include movement numbers such as:
1151-053S
451-050H
1161-853CSK
The letters attached directly to these movement numbers may identify features such as a high bridge, seconds indication, calendar arrangement, escapement style or another engineering specification.
The date code is generally a separate stamp. Its location may vary slightly, so examine the entire back plate before deciding which marking represents the production year.
Does the Date Code Tell You the Age of the Entire Clock?
The date code tells you when the movement was manufactured. It does not always prove the exact year the complete clock was assembled or sold.
Clock manufacturers sometimes purchased movements in quantity and held them in inventory before installing them into cases. It is therefore possible for the completed clock to have been produced or sold somewhat later than the year stamped on the movement.
The movement may also have been replaced during the clock’s lifetime. A newer date code inside an older case could indicate that a previous owner or clock repairer installed a replacement movement.
For that reason, the date code should be considered alongside other evidence, including:
The clock manufacturer and model number
Labels or stamps inside the case
Original sales receipts or paperwork
Movement design and construction
Dial style and case design
Known family history or ownership records
Can Hermle Movements Appear in Other Clock Brands?
Yes. Finding a Hermle movement does not necessarily mean the name Hermle will appear on the clock dial.
Hermle movements have been installed in clocks sold under numerous cabinet and clock-company names. A clock may carry one company’s name on the dial while containing a Hermle-manufactured movement inside.
When identifying a mechanical clock, the markings on the movement are often more useful than the name printed on the dial.
Does an Older Date Code Mean the Movement Must Be Replaced?
Not automatically.
The age of a movement is important, but age alone does not determine whether it should be repaired, restored or replaced. Its condition, wear, previous maintenance, availability of replacement parts, originality and the value of the clock must all be considered.
A heavily worn movement may require extensive rebuilding even if it still runs. Another movement of the same age may remain a good candidate for professional restoration because it has been well maintained or is important to the clock’s originality.
For mass-produced movements that are still available new, replacement may sometimes cost less than a complete mechanical restoration. For antique, unusual or discontinued movements, preserving and rebuilding the original may be the better choice.
A qualified clock repair professional should inspect the movement before a repair-or-replacement decision is made.
What If Your Hermle Movement Has No Visible Date Code?
Some markings may be faint, hidden by the clock case or difficult to distinguish from scratches and discoloration.
Try photographing the movement with good lighting and enlarging the image. Look above and around the Hermle or FHS trademark as well as near the movement model number.
If no date code is visible, the movement number, country-of-origin stamp and construction may still help establish an approximate period.
Markings such as West Germany, Made in Germany, FHS or Franz Hermle can provide additional clues, although none should be used by itself to assign an exact year.
Frequently Asked Questions About Hermle Date Codes
What year is Hermle date code I?
Hermle date code I represents 1996.
What year is Hermle date code M?
Hermle date code M represents 2000.
What year is Hermle date code Z?
Hermle date code Z represents 2013.
What year is Hermle date code AA?
Hermle date code AA represents 2014.
What year is Hermle date code AI?
Hermle date code AI represents 2022.
What year is Hermle date code AL?
Hermle date code AL represents 2025.
What year is Hermle date code AM?
Hermle date code AM represents 2026.
Is a Hermle date code the same as a serial number?
No. The date code identifies the movement’s production year. A model number identifies the movement series and configuration, while other numbers may relate to pendulum length, production specifications or individual clock records.
Identifying Your Hermle Clock Movement
The manufacturing date is only one part of properly identifying a Hermle movement. Before ordering replacement parts or a new movement, record every number and letter stamped into the back plate.
The complete movement number is especially important because small differences can indicate different pendulum lengths, chime arrangements, hammer configurations or other features.
When possible, take clear photographs of:
The entire back of the movement
The complete movement number
The date code
The pendulum
The chime hammer arrangement
The clock dial and case
These details provide a much more complete picture than the date code alone.
Need a Hermle Clock or Replacement Movement?
Just A Clock Collector is an authorized Hermle retailer offering new Hermle clocks and quality mechanical clock movements. Whether you are researching an older clock, looking for a replacement movement or shopping for a new Hermle timepiece, proper identification is the first step.
Explore our Hermle clock collection and available clock movements, or contact us with clear photographs of your movement markings for assistance identifying what you have.
Just A Clock Collector
