Bolt Ring Clasp Findings 0.7cm Dia 14k Gold Vintage Art Deco c1920.
The gold mark can be found to the clasp itself as well as the adjacent ring, this mark reads '.585'. Good secure clasp with a good spring to open & close.
Diameter 0.7 cm or 0.2 inches.
Total length 1.2 cm or 0.5 inches.
Weight 0.3 grams or 0.18 penny weight.