Mexican Sterling Man & Cactus Brooch-Pendant Marked BSP

Nice vintage sterling silver pin-pendant depicting a man holding a guitar and wearing a sombrero, with cactus nearby. Nice impressed and tinted geometric design border gives it a cutout look. Pin and loop on the backs o it can be worn as a brooch or strung on a chain for a necklace. It's marked "Hecho en Mexico 925", and has initials that look like BSP surrounded by hard to read marks -- something like "Navaca Morales"? 2" in diameter, and it weighs 13 grams on my scale. Great vintage condition.