Hi all,
Just a suggestion here to doublecheck whether production date is correct..
I have read from time to time that some esteemed members in the forum have connections in Bienne and are able to do a quick search on the archive, the Serial no. is fully legible in the pictures above, maybe someone could drop a line and kindly ask their contacts to confirm production date?
I have just read the thread and thought it quite interesting to see whether a 321 was indeed used in a '75 watch..
Not sure if this is possible at all (as it's not clear to me what informal connections can do at Bienne) but wanted to suggest something that may have not been considered by the members
cheers
Duccio