Vintage AMCO Black Onyx Oval Earrings 1/20 12K Gold Filled Signed Retro

✨ Stunning pair of classic Mid-Century vintage signed AMCO earrings. ✨ FEATURES: • Brand: AMCO (A. Micallef & Co.) • Metal Purity: Yellow Gold Filled, explicitly stamped "1/20 12K G.F." • Gemstone: Genuine polished black onyx cabochons securely set in 4 prongs • Shape: Oval • Closure Type: screw back • Era: Mid-Century Modern / Circa 1950s CONDITION: Excellent vintage condition with minimal surface wear consistent with age. The gold-filled finish remains bright and lustrous, and the black onyx stones carry a beautiful, glossy shine. Hardware is fully operational and secure. Please review all photos for details and exact measurements. From a smoke-free home.