Incredibly artistic very old iron and silver ring bit. I’ve never seen another one like it. Based on the design, I’d date it to late 1700s to early 1800s Spanish Colonial era. The silver and floral scrolls engraved on it are just beautiful. It’s definitely one of a kind and a museum quality piece.  In fabulous condition for its age. A wonderful example of the art of silversmithing the Spanish brought to the New World.