Bactrian coin ring R273
22k gold and Sterling silver reversible ring set with a Bactrian period silver drachm of King Eucratides I (circa 171-145 BC).
For details see Wikipedia.
Front: Helmeted bust of king.
Back: Dioscuri riding horses, Greek legend.
François Villaret design.
Internal circumference: 65 mm.
Total weight: 14.6 gr. Gold: 4.36 gr, silver: 7 gr.