プルーフ貨幣
1. Proof coinageProof coinage means special early samples of a coin issue, historically made for checking the dies and for archival purposes, but nowadays often struck in greater numbers specially for coin collectors. Many countries now issue them.
Read “Proof coinage” on English Wikipedia
Read “プルーフ貨幣” on Japanese Wikipedia
Read “Proof coinage” on DBpedia
Read “Proof coinage” on English Wikipedia
Read “プルーフ貨幣” on Japanese Wikipedia
Read “Proof coinage” on DBpedia
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