What are military badges made from?

Badges varied by country, type of badge and rank of soldier. For example, high-ranking Officers could have their uniform special made. Some badges, such as pilot's badges, were silver hall-marked fabrication, not much different from jewelry. Other badges were made with nickel alloy(commonly referred to as "German silver"). US Badges for enlisted men were made of brass. The collar discs designating Branch of Service and the "US" insignia were brass, as well as the cap badge. The German badges worn on their hats were made of light-weight aluminum alloy.