How to date an Omega timer by serial numbers... and any Lemania movement

tdn-dk

Here are the serials from mine, the dates i have used is from AJTT where the introduction date is. So 1966- is introduction date 1966

tapaptpat

What happens when you overlay your non military data?

I just did check my incoming 40s non-mil wristwatch and it fits to mid range 228xxx.

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tdn-dk

I think they are not off. I have papers on some of them but it is the selling date from the dealer and not the production/shipping date from Omega. They can have been laying at the dealer for years before selling.

This 3240936 serial have dated papers from 11/8 1976 but dates 1973 i the chart. But maybee it has been in stock for years at the dealer, who knows ?

tapaptpat

What happens when you overlay data from; non-military, documented with papers or caseback engraved stopwatch data, yours included. How well does the model fit?

tapaptpat

Another point of note. Although using military pieces that are dated, this has its own problems. Similar to your documented stopwatch. The watchmakers could swap case and movement

uwsearch

Military seems the most accurate way to date these timers.. some problems you mention might happen, but it's the better way in my opinion.
When I compare the few documented with papers I have to the graph, some were sold up to 15 years later, but I have one that is spot on..



Not a problem as serial number is only on the movement

A few black "nuit spatiale":

tapaptpat

If you had duplicates like the "few black nuit spatiale" are you seeing sequential serials or they appear to be random?

tapaptpat

As you have alot of data without a tangible date. Can it still be useful. I thinks so. Here is my early bird thought. Keep the wonderful chart you already have. Build a new chart with x-axis the same. Serial. But build Y-axis as number fitting in range. EG i'd expect to see spikes the columns every 2 years prior to winter and summer Olympics. Just fun nerdy thought. This is similar to the stock price vs volume traded graph pair you'll see in the markets.

uwsearch

I have very few duplicate as there are so many models (And I'm trying to refrain from buying duplicates). And each model was produced for 5, 10 or 20 years maybe, so it would be very unlikely to have enough samples to find sequences.


There won't be any peak before the Olympics as timers used by Omega for timing competitions have Omega movements.. not Lemania

tapaptpat

@tdn-dk

Forgot to ask the other day. What does AJTT mean?

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OMTOM

My contribution is small. I haven’t studied these – but nonetheless it’s of interest to me. I have only one stopwatch/timer, all the rest are chronographs. I think some of the Omega watches had movements produced by Lemania (marked Omega) which adds to the confusion.

I offer the following only to add to the data, hope it helps.

My one timer (I think ref MG6603) has number 1,855,***
I have two Ref 201, with numbers 12,780,*** and 13,648,***
I have two Ref 206, both with numbers 1,282,***
I have four Ref 1131 with numbers as follows: 2,201,***, 2,201,***, 2,324,***, 2,852,***

All of the above are marked Omega on both dial and movement (some dials show Omega ‘Olympic’).

So the numbering systems for the different references differ: the 201s may be Omega numbers but 206s and 1131s may be Lemania numbers

The Ref. 206 (at least) was a ‘fine’ movement, used also in observatory competitions, with Guillaume balance. There are ‘Bulletin de marche’ from the Neuchatel observatory for my two 206s (1964 and 1966) and one of my 201s (1952) – but still no idea of the dates of origin of the movements which of course may have been produced years earlier.

An interesting thread from March 2013 by MSNWatch who wrote “IMO one of the most beautiful movements omega ever made” – I agree with him!
https://omegaforums.net/threads/ome...ost-beautiful-movements-omega-ever-made.4375/
In this post, MSNWatch shows his Ref. 206 – again a number 1,282,***

I wish I could offer more. Tom