I do recall an excellent thread dedicated to BOR bracelets last year. From my recollection of it your bracelet is authentic vintage by No.12 stamp and the shape of the omega symbol. Whereas the OPs is probably later (not vintage) by the 80 stamp and shape of the omega symbol.
I will try post the link for the BOR thread unless someone else can. Or we can wait for the bracelet experts
View attachment 924030
Here is my 1068 vintage BOR bracelet with clasp stamps.[/QUOTE
Notice the thick bevelling (at top and bottom) of each outer endlink indicative of a vintage bracelet.
Click to expand...