I disagree .....
Looking through the Omega Museum Catalogue ( which doesn't list ALL omega watches).. I find the following entries... ( I have NOT changed any of the wording)
OMEGA De Ville chronograph 930, 1969: Calibre 930, 30-minute totalizer at right, continuous small seconds hand and date at left, dial with choice of four scales: tachyproductometric, decimal, telemetric or pulsometric. Plated water resistant case. (MD 146.0017)
The only OMEGA wrist chronograph with the date at left!
OMEGA De Ville chronograph 930, 1969: Calibre 930, silvered dial, line minute circle with outside tachometric scale, 30 minute totalizer at right, continuous small seconds and date at left, lunette with choice of four scales: tachyproductometric, decimal, telemetric or pulsometric. Steel water resistant case. (ST 146.0017) The one and only OMEGA wrist chronograph with the date at left!
So they have 2 watches in the museum & both have the same case ref # ( the ST version is pure stainless & the MD is gold plated) & both have a 930 movement. They are both listed as De Ville's & not Seamasters or Seamaster De Ville's.
The important comment is "The one and only OMEGA wrist chronograph with the date at left!"
HOWEVER
There is currently this watch in the Bay...
which I guess is the reason for the question. It looks genuine enough ( I am NOT saying it is or isn't). So have Omega got their facts wrong ?
( does the word Omega look funny to you on the above watch ? Why does it just say "SWISS" at the bottom of the dial & not "SWISS MADE" ? )
Note in the auction text, it lists the case Ref # & guess what.... it is 146.0017 . So it could be a refurbished dial, or , as is said, Omega have got their facts wrong in the Museum catalogue ?
Another ( the only other as far as I know ) watch that uses a 930 movement is the "bullhead" it looks like this - on the right ( Pic courtesy of Chuck Maddox)
This is the same movement, but a completely different watch. The chrono buttons are at the top of the dial.
Finally, I am not watchmaker, but I don't believe the 930 movement was based on the chronostop movements.
The chronostop movements are either the 865 (non-date) or 920 (with date). These movements only have a winder crown( @ 04:00) & a SINGLE start/stop/reset button( @ 02:00). They have no subdials.
So externally they seem to share nothing with the 930 movement.
Also, I have a SINGLE technical guide showing the various parts for the the movements 860/861/910/930. This is dated 1970 ( the 865 was available from 1966 & the 920 from 1968) & mentions neither of the chronostop movements.
When viewed from behind the 860/861/910/930 & now 1861 & 911 ( Probably a few others too) look identical.
The 865 & 920 look completely different.
I would suggest the 930 is NOT based on an 865 or 920 (chronostop) , but probably on an 861 (speedmaster)...
related links....
Omega Chronostop watches
Omega technical guide for the 860/861/910/930 movements
Just my opinion
Steve
