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listed as 37.5mm,
OT 2272
And it's a bit smaller than the Jumbo 2545.


Hi Bill,
I doubt that your watch is a 2609... it looks completely like my 2544 while the 2609 looks different as we can see by the other examples in this thread...
Just an assumption!
One of the 2 shown 2609 must be wrong or a marriage!
Have you ever asked for an extract from the archives to confirm movement and case matching??
I have one 2544 but unfortunately case is not at hand - it is in Germany for restoration at the time - I have only a poor picture of the case...

But at least you can see the strait parallel lugs and the wide bezel - it looks completely like yours!
And you can find it on the Omega data base where you can see the lugs in profile (oval shape)!
The other references shown in this thread are considerably smaller at 37,5mm (1,5mm less).
So 2544 and 2545 (SC) should be the largest 30mm cases at 39mm I guess.
Kind regards
Erich
By looking at the lugs and shape, it's a 2544 powered by a 266 caliber like this one.


and here is the lugs of her sister 2545.
I received my 2544 today, here it is.
2544 and 2545