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If you need a specific part then please see my Atmos parts page.
If you need service and repair then please see my Atmos service page.
Atmos Clock & Herschede Clock Dating Information.
I have a small Web page on the history of the Atmos and it can be found at: Atmos History.
Copyright © 1996-2022 Michael P. Murray & Mike's Clock Clinic
LeCoultre Atmos dating by serial # http://www.atmosman.com/pdf/$atmos.pdf
Using the PDF file above you will see some of the Atmos clocks listed by serial # that I've worked on and you can extrapolate the date of your Atmos from those listed.
LeCoultre Atmos Dating by Decades
Decade |
Range of Serial #’s |
2000’s |
705,000 and up (Educated guess) |
1990’s |
650,000 to 704,999 |
1980’s |
520,000 to 649,999 |
1970’s |
300,000 to 519,999 |
1960’s |
127,000 to 299,999 |
1950’s |
25,000 to 126,999 |
1940’s |
6,500 to 24,999 |
1939 |
6,000 to 6,499 |
LeCoultre went into full production around May of 1939.
The above dates and serial numbers will give you a reliable
way to date any Atmos. Please realize that this is not an
exact list because LeCoultre did keep some serial numbers
for certain calibers and they tend to jump, so there is
some overlap but the above is about 98% correct.
The guess on the 2000’s and up is because all the dates
are based on my overhauls of the Atmos and I simply have
only overhauled a few made after 1999.
Now for the specific dating information I offer.
The following Acrobat file contains some of the Atmos clocks I have work on, listed by serial
number. After the serial number is the date that was found on the bellows.
The bellows were made in batches, so there is some duplication but more than enough
information to date your specific Atmos to within a month or so.
All I ask is that you reference where you obtained this information if you use it anywhere on
the Web including sales or auctions.
http://www.atmosman.com/pdf/$atmos.pdf
This file contains some of the serial #'s of Atmos clocks that I have
repaired that still have had the original bellow intact.
The serial numbers are located on top of the movement next to the fast-slow adjustment. On
some early caliber 519's and the Atmos II´s the serial number is located on the bottom of the
movement and you can see it through the front of the case.
The caliber's from the 522 to the Atmos' made today are stamped, with the particular
caliber #, on the bottom of the case. The Atmos II and caliber 519 were not stamped on the
bottom and are nearly identical. You can tell the difference because the Atmos II has the speed
adjustment as a turn screw rather than a slide lever, which is found on the caliber 519 and all
models since.
Estimating the value of your Atmos
Please see: Estimating the Value of Your Atmos
For information about my Atmos overhaul, please see this page:
Atmos Overhaul Service
Herschede Dating Information
Herschede dating can also be obtained in an Adobe Acrobat file located at:
http://www.atmosman.com/pdf/hersche.pdf
A service from, E-mail address Mike@atmos-man.com
Mike Murray Founder of Clocksmiths
A specialist in Atmos and 400-day clock repair.
Also, I overhaul most plug in electric clocks.
In continuous service since 04/01/1982.
Mike's Clock Clinic Membership: NAWCC
P. O. Box 562
1151 D Street
Fossil, OR 97830-0562
My Web site is located at http://www.atmosclock.us/
Main FTP site is located at http://home.earthlink.net/~atmosman/earthpdf.html
Memberships: Clocksmiths; NAWCC
N.A.W.C.C. International 400-day Clock Chapter # 168
Formally Published in Chapter 168's "Torsion Times"
Formally Published in AWCI's "Horological Times"
Formally AWCI's 400-day (Anniversary) clock Bench Course Instructor!
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Copyright © 1995-2022 Michael P. Murray & Mike's Clock Clinic
Created in December of 1995 and last updated January 18, 2022.