How old is my ATMOS?

If you would like to know when your ATMOS was made, sim­ply send us the seri­al num­ber. Over the years we have com­pi­led a “clo­sed” list of seri­al num­bers from 1930 to 2016 and will be hap­py to tell you – on request – the year your clock was made.

Here is some gene­ral infor­ma­ti­on: the Roman nume­rals often used for the ATMOS, such as ATMOS I, II, III, IV up to ATMOS VIII, deno­te the dif­fe­rent designs and fur­ther deve­lo­p­ments of the ATMOS. Tog­e­ther with the calib­re num­ber, they let you nar­row down the type and the peri­od in which a par­ti­cu­lar clock was made or offe­red.
The ATMOS I are the Reut­ter clocks. The “hig­hest” num­ber I have had on my bench was 6809, which I offe­red for sale in 2019.
The ATMOS II still has the rota­ry fine regu­la­tor, at first facing back­wards, later facing for­wards. The­se vari­ants were built with seri­al num­bers from approx. 6,700 to 23,000. The first clocks made befo­re 1948 still had the sold­e­red-in expan­si­on cap­su­le, which by now is usual­ly defec­ti­ve and has some­ti­mes alre­a­dy been repla­ced (a some­what labo­rious job…), becau­se you need a new cap­su­le, a cap­su­le housing and the clip with com­pres­si­on spring that holds the cap­su­le in its housing. Appar­ent­ly it was only from 1948 onwards that they were able to make a bel­lows “in one pie­ce” that could be exchanged.

…on the ATMOS I and II you will usual­ly still find a seri­al num­ber on the move­ment pla­te.
The ATMOS III alre­a­dy has the fine regu­la­ti­on with the small adjus­ting lever we still know today. It usual­ly still has the 3 and 9 lying on their side and was built until approx. 1954 (a few examp­les also as Calib­re 529), up to approx. seri­al num­ber 70,500.

Then came the ATMOS V with cali­bres 522 (60,000–69,000), 532 (60,000s) and 526 (from 70,000).

The calib­re built in the grea­test num­bers was the 528, as the ATMOS VI (still with a hood), VII (with swing door) and ATMOS VIII (with a glass win­dow at the front). The­re are cer­tain­ly more than 200,000 of the­se. The second most com­mon was the ATMOS V with Calib­re 526, also cal­led 526/5. Of cour­se, the­se series came with a wide varie­ty of dials and case gla­zing – from plain glass to Feuille d’Or, from the Mari­nas in black and opal to the vari­ants with glass pain­ted from the insi­de, and much more.

If you have any ques­ti­ons about fur­ther details, sim­ply send us an e‑mail.