15mm 14k Solid Yellow Gold Pocketwatch Swivel Triggerless Clasp Open Jump Ring
14k Yellow Gold Swivel Trigger Clasp. (OPEN) Jump Ring 2.5mm ID 4.5mm OD 20ga. Clasp end would require a 1.80mm opening to attach to. Clasp opening 1.45mm. 5mm at thickest section.