Elegant Napoleon III 18K gold brooch in the Etruscan Revival taste. The pin is in bar form with pointed ends, interrupted in the middle by a round black onyx plaque centering a natural seed pearl. The domed setting around the onyx is set with six natural seed pearls. The pin on either side of the onyx plaque is decorated with an engraved Greek key design. The reverse is hallmarked with the "tete d'aigle" stamp for 18K gold and also with an unidentified jeweler's mark.
Origin: France, circa 1870. Condition: excellent; all original, including tube-hinged pinstem with trombone clasp. Size: 2-5/8" x 13/16" (widest). Weight: 6.5 grams.