Vintage unsigned/marked Sterling horse head W/rhinestones/enamel/vermeil brooch

Beautiful horse head brooch is unsigned and not stamped Sterling but tarnishes. The ears are bordered in black enamel and the mouth is red. The piece is lined with blue rhinestones with a red rhinestone eye framed by black enamel. The vermeil is in excellent vintage condition with light wear. The pin is shiny and sturdy. I purchased this brooch about 25 years ago. At the same time, I purchased a Coro craft set of horse head fur clips. This brooch is very refined with a slim muzzle and enamel details. 2 1/8” x 7/8”. Bag 3