Vintage Silver Bracelet ID Help

Purchased at the Gallup NM Flea Market in the 1980’s. Vendor had a lot of vintage silver, Turquoise, etc. jewelry. Have been unable to determine the maker.
Bracelet is about 1 mm thick.

Any help with ID appreciated.

I couldn’t find anything in the reference books and unfamiliar with this hallmark. What do you believe the letters to be?

Under the loop appears to be a cursive O with a loop at the center, a / mark and maybe an outlined block style printed Y. At first I thought the Y might be a 7.