Vintage Diamond, Platinum, 14k Yellow Gold Bow Brooch. Designed as an open work bow with black velvet backing, the center featuring one old European-cut diamond weighing approximately 0.30 ct., accented by single-cut and rose-cut diamonds weighing a total of approximately 0.35 cttw., set in a platinum mounting with applied 14k yellow gold pin stem backing and measuring approximately 20 x 48 mm. {Gross Weight: 6.5 dwts} Provenance: From a private San Francisco Bay Area Estate with lineage dating circa 1890, St. Petersburg Russia. Note: Gold backing hallmarked "AH" and pin stem and bail. Box bent, gold backing not original.