- Size: 35mm x 35mm Thickness: 4mm - Material: Brass - Year: 1981 - Maker: Yoshisada Yamada Unopened. A gift from an acquaintance. It appears to have been kept carefully at home unopened, and there is no rust. As this is a home-stored item, please take a look at the photos and only purchase if you are satisfied and understand the condition. The item will be shipped via Yu-Packet Post Mini. No claims and no returns, please.