Hello to everyone,
I was told that this omega was one of the very first seamaster series.I doubt it but I'm not an expert on this It's a cal.267 and caries the logo on the outside caseback as seen in the pic.
Cheers!

 

Ok, I've made my research and according to Omega site the Seamaster model was launched in 1948 to coincide with the brand's 100th anniversary. Very far from my watch which dates from 1959! It seems that the first seamaster watches were automatic and with reference CK 2518.

 

The case back is sublime!

 

I want one with that hour hand

 

Here's an earlier one:
The second hand was conveniently replaced by an Omega original.