Reverend Rob
Posted August 1, 2014 - 9:45am
The 10BZ came in all three common jewel counts, 17, 21 and 23, but Doc shows it in production from 1959-1963.
Definitely a swapped movt, I'm thinking the BB from 1969 would have had a different movt calibre, most likely a cousin of the 10BZ, although I'm not seeing anything with a sub second that late.
My gut is thinking that the case has had a transplant of movt and dial from 1959.