Brt-200. Wt = 5.92g. Diam = 21.3-21.6mm

Au (%)	Ag (%)	Cu (%)	Zn (%)	Ni (%)	Sn (%)	Bi (%)	Pb (%)	As (%)	Fe (%)
91.39	1.48	6.77	0.06	0	0.07	0.03	0.04	0	0.16
90.99	1.51	7.21	0.06	0	0.04	0	0.04	0	0.15

Stevens Collection

Photo from Dr Busso-Peus