I think the glass dates this one to around 1930-40's - the inside of the pin is clearly marked 1/20 10kt G/F - I tried my bst to capture that. There was initially no stone in the center so I replace it with a new rhinestone. The pin measures 1 1/4" across and just under 1 inch wide. This one has the standard rollover clasp and is in proper working order. There's a lovely rope kind of design on the outer edges - only one I have.
Will ship via USPO with delivery tracking.