A challenge coin, also known as military coin, unit coin, memorial coin, or commander's coin, is a small coin or medallion, bearing an organization's insignia or emblem and carried by the organization's members. Traditionally, they might be used to prove membership to the issuing organization when asked (the "challenge") or as a commemorative award.
A challenge coin, also known as military coin, unit coin, memorial coin, or commander's coin, is a small coin or medallion, bearing an organization's insignia or emblem and carried by the organization's members. Traditionally, they might be used to prove membership to the issuing organization when asked (the "challenge") or as a commemorative award.
Source: Wikipedia "Challenge coin" · CC BY-SA 4.0
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