Challenge Coins

The practice of carrying a coin designed specifically for a unit was popular with the Army Special Forces. Carrying the coin at all times and presenting it when "challenged" to prove affiliation with that unit resulted in a number of consequences for those who could not produce a coin - the most popular required the coinless soldier to buy a round of drinks.  Today coins are used for many reasons, and collecting them has become a fantastic hobby.

Korea Service Challenge Coin

J.T. Knives Price