Elegant antique Tiffany & Co. hat pin in 14K gold, dating to the Edwardian period (circa 1900–1915). The pin features a distinctive spherical onyx finial with a faceted central band, framed by smooth gold elements and encircled by a decorative gold spiral. The design is refined and sculptural, characteristic of early 20th-century Tiffany accessories. The shaft is stamped “TIFFANY & CO.” and “14K”, confirming both maker and gold purity. An additional small punch mark is present on the collar, likely from later handling or import, consistent with antique pieces of this type. Hat pins of this size (approx. 16 cm) were used with large Edwardian hats and are increasingly sought after by collectors, particularly when signed by prestigious makers such as Tiffany & Co. Condition: Good antique condition with light wear consistent with age. Minor surface marks visible under close inspection. Structurally sound.