In great condition, not polished: Seamaster is still visible in the case back 
The early automatic Omega caliber 354 bumper or hammer automatic 
All stainless steel 
Case back reference C 2577-11sc 
Movement number 13904676 
Size: 34 mm (without crown) 11 mm thin 
Created in 1952, 17 jewels 
Screw in case back 
Crystal: Armoured hesalite 
New black leather bracelet