Circa the early 1940's, during WWII Taxco silver Maestro (Master) Hector Aguilar entered into an agreement with Coro to design and produce jewelry for them in Mexico. This rare pair are signed and marked, with Coro, Silver, and Mexico. They each have a properly working safety catch closure and measure approximately one and one half inches across. I have not polished them, so they have the original patina and are in excellent to near mint vintage condition. They will shine bright as new when polished.