I've inherited a vintage Seamaster and I'd like to know more about it. My watchmaker opened it (screw-on case back) and said the serial number is 13,096,558, the case is #2640, and it has a caliber 283 shock resistant manual wind movement. The lugs are gold shell over stainless steel, the bezel, crown, and hour markers are gold, and the rest of the case is polished stainless steel. The dial is silver with an applied gold Omega symbol above "Omega" in black block letters and "Seamaster" in black cursive letters. The black minute markers are very small, about 1mm, and are at the edge of the dial. It says "Swiss Made" in small, black block letters below the 6 o'clock marker. The case is 35mm in diameter, the width between the lugs is 18mm, and the length between the lug tips is 44mm. The holes for the spring pins go completely through the lugs. It's a family heirloom: The original owner would be over 100 years old if he were still alive. Anything anyone can tell me about it would be very much appreciated. Thank you.

 

Gonna need photos in order to get much meaningful feedback.

 

You seem to know a lot about it already. Would be helpful if you mentioned what you want to know.

 

https://omegaforums.net/threads/vintage-omega-posting-guide.383/

 

Just curious.

AFAIK ref. 2640 was NEVER a Seamaster. It should have, as you say, cal. 283 and only Omega on the dial.
Movement serial dates it cca. 1952 and first Seamaster model with manual winding appear sometime around 1954/55 in different case (ref. number).

So I think that the dial has been replaced at some point.

That said and very confusing to me a vintage Omega database shows a picture with Seamaster on the dial for ref. 2640 .

So I might be wrong as well.

https://www.omegawatches.com/planet...ache=1&cHash=79420bf0caccb2998328161cd4136a2d

 

Without pictures, this thread is truly worthless.

Hope that the OP will post some soon, I look forward to seeing this one

 

My 2640 does not have Seamaster on the dial.

 

like to see this watch too.

 

Maybe for vintage watches, but here the very first rule of inquiries is "no pictures = no help". It really is the first rule if anyone is wondering: