This is a precious piece from AMCO. This is a delicately designed 12K GF Victorian Style Ribbon Brooch. The Bow has fine engraving and milgrain work. From the Bow dangles an oval framed onyx (may be simulated but it is stone or glass) stone. The Brooch measures 1"W x 1 1/2"L. It is in very good condition, showing very little wear. Circa 1960s. ENJOY! AMCO was founded in 1919 in Providence, RI. The company manufactured gold, gold filled and silver jewelry. Amco jewelry has elegant and classic designs somewhat similar to Van Dell jewelry. It is assumed they went out of business in 1970. Collectible.