What year did the crowns start getting stamped BULOVA?

Submitted by alwayscode390 on

I have a 1953 and 1954 watch with a BULOVA stamped crown ... but was looking at a 1951 without the stamp on the crown.

It got me curious if anyone knows what years had the stamped crown.

The 1951 may not be the original crown, but seems the correct size.

Thanks!