These are actual Japanese square coins that circulated in the 1800's. These coins are 2 Bu gold (Nibu-Kin).
Alloy make up of coin: 22-23% gold, 77-78% silver. Gold weight per coin: 0.69 grams. Silver weight per coin: 2.31 grams. Japanese coin catalog reference: JNDA 09-29. Coin will be randomly selected from the group.