Antique Sterling Silver Intaglio Camphor Glass Greek God Brooch

Whimsical antique reverse carved glass sterling silver brooch is marked STERLING and features a winged Greek god, I have seen labeled Eros, blowing bubbles in a delicate silver leaf setting.  The glass is signed "RS" under the feet, and there are two small chips in the glass under the top center leaf prong.  It measures 1 3/8 inch by 1 inch wide and it weighs 7.4 grams.  It is in great vintage condition.