| 摘要 |
PROBLEM TO BE SOLVED: To provide a coin for a game in which the kind (genuine one or forgery) of a coin for a game can be surely and simply distinguished, and a method for manufacturing the same. SOLUTION: By inserting a magnetic flux detecting material 6A, which comprises a distinguishing material 4 having magnetic permeability differing from that of a coin 7A for a game and in which a given pattern 4A is formed, with in the coin 7A and passing the coin 7A over a Hall element arranged in a magnetic field, a Hall voltage in a pulse from according to the given pattern 4A is generated and the kind (genuine one or forgery one) of the coin 7A can be distinguished based on this Hall voltage.
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