Antique Victorian Solid 12K Rose Gold Infinity Pin Brooch Pearl Trombone Clasp

For your consideration, an antique circa Victorian era infinity love knot pin brooch made out of solid rose gold with a cultured pearl, the gold content is unmarked, tested with acid, confirmed at least 10-14K solid gold content, closes on a trombone clasp, a rare construction with a tube hinge and an original trombone clasp, the mechanism works well and holds securely, an absolutely gorgeous and unique estate find, with lots of untreated aged patination, from a non-smoking environment, measures 3.5 cm.