Watch List notes:

JAPAN: AR gin kwan (20.09g), Opitz pg. 280, Munro pg. 5, 30mm, "silver ring money" silvered copper ring; with some original plating intact, VF, R, ex Charles Opitz Collection. Various forms of ring money were used in Eastern Asia, including Japan, for at least 2,500 years; usually made of hollow copper with a thin layer of gold (kin) or silver (gin) applied to the outside surfaces; an intriguing piece which is sure to delight the advanced collector of Japanese numismatics or primitive money.

Estimate: 100-150 USD