Ooo Ooo, I know. It's a 1963 Snorkel
Down boy, of course it is!
Snorkel, beautiful restoration.
Excellent Snorkel Example!
How do We know the Watch is from 1963?
caseback stamped M3 on the inside
That's an unusual spot for an alphanumeric datestamp as they're typically found on the outer back, could You post a pic for Us?
Mark - I think that on this style case back the date stamp is always on the inside.