could be in either of them as you got the 70's one I think it was and the new one that was out last year did you check both ?
no he said c b with a no date sub
Lots of old watches, ex mwc vet -Ceud mile failte , CWC ,,Longines Legend diver ., Omega Geneva & Seamaster 300 GMT, Seiko King Seiko plus,, Tudor black bay 58, Tissot Titanium Chronograph. Seiko miscellaneous.