Size in cm's: OH: 2.20cm.; OW: 1.9cm.
Winterthur's SRAL used XRF to measure the gold alloy on September 19, 1988 according to request 2298-B:
Copper 28.3% Silver 16.8% Gold 54.9%
Bibliography and Bibliographic Notes
Book: Fales, Martha Gandy. 1995 Jewelry in America, 1600-1800.