We found similar comps all saying sterling (925). We believe this one is as well but likely the 925 has rubbed off over time or it may be less silver content. Could also be Alpaca (not silver) but we just don?t know for sure. So we are just calling it silver. What we do know is that it is inlaid with turquoise in an Aztec styling, has a very nice push button/slide closure and fits a 6.75 inch wrist (max). 1/2 inch wide. Really nice piece that needs a deeper clean than we gave it. Will ship USPS with tracking to winning buyer