early 1960'sNovember 29 2011 at 3:21 AM
from IP address 188.8.131.52
Response to Questions about 20mm rivet bracelet
As far as I know the numbers appeared in the beginning of the 1960's, but if it was 61, 62 or 63 I am not sure.
The band type itself has been made from 1953 up to 1969/1970