The Japanese Proof Set (プルーフセット), commonly known as the Proof Set in the United States, is a set of proof coins sold by the Japan Mint. These sets were first issued in 1987 (Shōwa 62) as "regular proof sets" consisting of denominations of 1, 5, 10, 50, 100, and 500 yen (666 yen total).
The Japanese Proof Set (プルーフセット), commonly known as the Proof Set in the United States, is a set of proof coins sold by the Japan Mint. These sets were first issued in 1987 (Shōwa 62) as "regular proof sets" consisting of denominations of 1, 5, 10, 50, 100, and 500 yen (666 yen total).
Source: Wikipedia "Japanese Proof Set" · CC BY-SA 4.0
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