Vintage "Mexican Silver" Disc Earrings with Bells

This is a pair of vintage earrings known as "Mexican Silver". The disc features worked silver and has what I believe to be brass bells dangling beneath. The bells work, the earrings are in wearable condition. Although unmarked, I'm fairly certain this is silver and brass. It is non-magnetic and just has the "look" of silver. Really fun earrings. A tiny bit of tarnish or verdigris on the backs, may need a little cleaning.