Vintage 1960s Signed Armco Mesh Screwbacks Earrings

These screw back earrings date to the 1950s and were made by Amco (A. Micallef & Co.) Of Providence, Rhode Island. They feature a scrolled frame draping a mesh dangling a prong-set and faceted black stone. The earrings measure 15/16” long and are signed “Amco 1/20 12KT Gold Filled”. Very good vintage condition.