10kt Gold Filled Genuine Shell Cameo Ring Size 6 Mid-Century F299

I measure this ring as a size 6. It is probably from the 1950's and it is in great shape.  It has a 10kt GF mark and a makers mark so we know where it came from. This was crafted by Esposito Jewelry, Inc. (ESPO), a prominent family-owned manufacturer founded in Providence, Rhode Island in 1911 by Alfredo Esposito. Over four generations, the company built a strong reputation for high-quality American costume and fine jewelry, becoming particularly renowned in the mid-to-late 20th century for its Victorian-revival designs and shell cameo settings. Marked 10KT GF ESPO, this piece features a durable 10-karat gold-filled setting—consisting of a solid 10k gold layer mechanically bonded to a base metal core—offering the lasting beauty and tarnish resistance of solid gold at a fraction of the cost.