Vintage 12K Gold Filled Heavy Duty 9mm Spring Ring Clasp for Bracelet/Necklace

This is an exceptionally crafted vintage, heavy duty 1/20 12K gold filled spring ring clasp from the 1960s for a necklace or a bracelet. This spring ring clasp measures approximately 9mm. in diameter and 2mm. in thickness and is very sturdy. Vintage spring ring clasps are outstanding in quality and were crafted to last back in the day. This is not one of the brand new, rough looking and poor quality spring ring clasps that are made in China. I only sell vintage and high quality findings as well as Tiffany & Co. jewelry findings. COMPOSITION: 1/20 12K gold filled MEASUREMENTS: 9mm. in diameter and 2mm. in thickness WEIGHT: 0.4 grams CONDITION: Pre-owned, excellent MARKINGS: 1/20 12K G.F. ORIGIN: U.S.A. CIRCA: 1960s