NOS unused 1953 Speidel First Nighter Photo Ident 10k white gold-filled scissor-expansion watch bracelet with flip-open photograph keepsake compartment.
The photo is replaceable with your own.
The ends are curved 3/4" (18.8mm), you can file them to 11/16" (17mm-18mm) or 5/8" (just under 16mm).
