DrStrong
[Rolex Moderator]
6930
In principle...
the 6239 movement timeline is:
- cal. 72B from 1963 to 1965
- cal. 722 from 1965 to 1967
- cal. 722/1 for the last production.
For instance, my 6239 with serial 1,658,XXX has a cal. 722.
As you say, the improved cal. 727 was designed in the late 1960's for ref. 6262/6264.
I am not aware of any testing of the cal. 727 in the mid 1960's, but why not...or the movement of your watch has been changed at some point during service.
Concerning the position of the word Daytona, your dial sounds very corect. Your bezel also.
We are looking forward to seeing pictures !
Cheers
Jeff
This message has been edited by DrStrong on 2008-12-17 13:06:42
6239 --- 6262 timeline question
Recently bought a Rolex 6239 which I'm in the process of restoring (got the case-back off).. It's marked inside as a 6239 - the watch's serial is in the 1.6 millions indicating mid 1960's (the case back is 6238 indicating earlier 60's when they used whate...
In principle...
the 6239 movement timeline is: - cal. 72B from 1963 to 1965 - cal. 722 from 1965 to 1967 - cal. 722/1 for the last production. For instance, my 6239 with serial 1,658,XXX has a cal. 722. As you say, the improved cal. 727 was designed in the late 1960's fo...