Very Old Silver South American Shawl Pin Manta Pin

I have had this silver manta pin since the 1980s. I bought it at a local import shop in Kalamazoo. I have seen other listings for this South American made manta pin claim that they are antique. I have no way of knowing but would not be surprised. It is a stunning shawl pin measuring 1.25x3.25 inches. It is silver - the pin portion is another metal, not silver. There was a stone in the center at one time. That stone is missing. The buyer can choose a stone! Gorgeous silver manta pin.