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The "266" is just the last 3 digits of the case serial number. This was used at the factory in the UK to match the pieces to each other.
There is also a case reference number of 121(.)5400. When you Google that reference, these turn up:
https://www.blackbough.co.uk/produc...ld-vintage-wristwatch-hallmarked-1964-wwomgw/
https://www.blackbough.co.uk/produc...ld-vintage-wristwatch-hallmarked-1963-wwogw3/
So this watch should have a caliber 269 movement from the early 1960's. Here it is in an old Omega UK catalog:
http://www.old-omegas.com/catuk63.html
Hope this helps,
gatorcpa
Hi,
Thank you for taking the time to reply. I'm looking to see if any other Omega movement other than a 268 or 269 movement will fit in it.
well that is not exactly true , there is subtle shape difference between those models , and the movement and case stem hole may not be aligned if you don’t take the correct reference.
If you look closely they don’t have the same profile . I haven’t noticed a difference between a 30t2 and a 265 but the 267 is different . I had a case made for a 30T2 and It was ok with a 267 until I tried to put the stem in and it could t go in .
You don't have an Omega case at all in fact.
Respectfully disagree. Vintage Omega watch cases were made by contractors in various countries, including Switzerland.
So either all cases with the Omega trademark are “Omega” cases or none of them are.
All depends on how you define it.
gatorcpa
I’ve shown it in a UK catalog, and found the same UK reference twice from a UK seller with the same caliber 269. I’m not sure how much more research on this case is required.
The OP is going to need to match a dial to the case. It is possible that only UK export dials will fit this case. No way to know without detailed measurements from many angles.
gatorcpa
I’ve shown it in a UK catalog, and found the same UK reference twice from a UK seller with the same caliber 269. I’m not sure how much more research on this case is required.
The OP is going to need to match a dial to the case. It is possible that only UK export dials will fit this case. No way to know without detailed measurements from many angles.
gatorcpa
Fair enough You have the advantage on me there. As I mentioned, I couldn’t read the numbers stamped in the caseback on my phone clearly and perhaps didn’t pay enough attention to the detail you provided which does seem comprehensive. My excuse is that I drive for 6 hours through the rains of storm Babet today and am a little zombiefied as a result.
I would question whether a local case is always regarded as fully factory though. They are often (and often wrongly) considered somehow inferior by some. Omega used cases made in Italy, France, UK etc etc for those markets but did treat them differently and the assembly was usually local so there is a difference. The 5 in the case number for instance is a UK specific thing, more usually seen on later Shackman made stuff. It is rare to see an Omega number in a Dennison case, it must be a late one.