The Challenge coin is a unique souvenir that is widely used by military, law enforcement and government agencies. They are made of metal and have double-sided patterns and text to recognize the achievements, honor, or loyalty of a particular organization or individual. These coins originated in the military and became popular during the First World War. Traditionally, challenge coins are presented by superiors to subordinates in recognition of their outstanding performance or to demonstrate their loyalty and honor. Holders of challenge coins are required to carry them with them to prove their identity and belonging. Challenge coins are usually made of metal, such as brass, silver, nickel, etc., and have one side of an organization's logo, pattern, or slogan, and the other side of a specific event, date, or personal information. Some challenge coins also have different fancy edges or decorations that add to their uniqueness and value.
