Sterling Silver Bolt Ring Clasp Findings 0.9cm Diameter Vintage Art Deco c1920.
The silver mark can be found to the one side, this mark reads 'sterling'. Good secure clasp with a good spring to open & close.
Diameter 0.9 cm or 0.3 inches.
Total length 1.3 cm or 0.5 inches.
Weight 0.4 grams or 0.25 penny weight.