Omega Seamaster 300 case back authentication

Posts
49
Likes
8
Found some case back
I cant identify this so want some professional advice please
 
Posts
21,868
Likes
49,615
Funny, you also see this "waterproop" error on fake Fortis supercompressor case-backs. Although usually someone completely obscures it using a polishing wheel.
 
Posts
28,136
Likes
71,975
Waterrroop?

We have apparently gone from "certifed" to "waterroop" as the typo de jour...
 
Posts
1,688
Likes
3,981
We have apparently gone from "certifed" to "waterroop" as the typo de jour...
That is a custom title for a while!