Hello, please do you know something about this watch, ref. 381, 35 mm, photo: and http://www.humanart.cz/soubor/2105/omega-strjo.jpg and http://www.humanart.cz/soubor/2105/omega-zadek.jpg and http://www.humanart.cz/soubor/2105/omega-vni.jpg Thanks a lot for your answer and have nice time Milos
isn't it a Suveran? (without explicitly entering into the debate about whether or not suverans have to have "suveran" written on them)?
"381" is not the caliber number. It is a serial number used to match the case parts. You'll see a matching number on the back of the lug. The caliber is the 1st generation 30T. If you look closely you can see the number "30" under the balance wheel. Not a military issued watch, or a Swedish Suveran. Still a very nice example of the original 30mm movement from around 1939. Hope this helps, gatorcpa
The only model I see that could fit is the CK 2118 from the 1940 catalog, a waterproof model in the Naiad line : The three slots caseback is also found on other naiads of the same period. Nice Watch. It probably has its original dial and hands.