Really useful for spares & repairs to your favourite necklace this is a great 9ct rose gold tongue & box clasp by Ciro dating from the 1950's. The gold mark as well as the Ciro mark can be found to the rear. Good secure clasp. Size 1.3 x 0.8 cm or 0.5 x 0.3 inches. Weight 0.7 grams or 0.4 penny weight.