This bracelet showed up on a Speedmaster I acquired some time ago, but I don't recognize it and the Google doesn't either. I don't think it's originally for a Speedmaster obviously, but the only real clue I have are the 20mm end links marked "50" and the J/M 1/10 14 KT G.F. marking on the clasp. However, the bracelet does not look as though it had ever contained gold; either the clasp is mismatched or someone out there has done a fantastic job of removing any gold content and keeping the rest of the bracelet looking like it was made in stainless steel... Wondering if anyone knows where this one came from:
A good lead, thanks! Definitely helps figure out the clasp markings. But the Holzer jubilees had wide center links, where mine has 3 rows of equal-width links in the center. I wonder if it's another Holzer model possibly made for Seamasters.