Here are some tips to help you avoid purchasing a fake vintage Omega.
Here's a classic fake Seamaster:
First, you won't find "antimagnetic" or a jewel count on the dial of any Seamaster. Second, that's one crappy movement. Omega copper plated their movements since the word
Seamaster has been used on the dial. Third, Omega
never put the hallmarks (like the Ω WATCH Co inside the triangle or the 18K 0.750) you see on this watch's caseback on the outside - they were always on the inside.
Thread it came from:
http://omegaforums.net/threads/seamaster-elecromagnetic.6234/
Here's another example in a different case:
The thread it came from:
http://omegaforums.net/threads/seamaster-not-found.6152/
Bottom line: ASK
BEFORE YOU BUY! Part of the reason this forum exists is to help less experienced people buy decent vintage watches without getting ripped off. We don't even charge! It's a FREE service!