Old Pawn 1940's Mexico Sterling Silver Carved Green Onyx Warrior Mask Brooch Pin

Old Pawn 1940's Mexico Sterling Silver Carved Green Onyx Warrior Mask Brooch Pin I haven't cleaned it but it's been in my family for decades. Very cool sterling silver pin with stone face, made in Mexico. Measures: 4" at its widest point and its 2" tall. Some scratches on the silver and has its original tarnish. Has a signature or stamp that I can't read.