Poongsan Corporation is a South Korean manufacturer of copper and alloy materials, ammunition and precision forging products founded in 1968. The company's main business areas are non-ferrous metal processing, such as bi-metallic coins and copper alloy products, which account for 70% of sales, and it also manufactures various military ammunition, gunpowder, and propellants. As of 2023, bimetallic coin products produced in Poongsan are exported to more than 70 countries and account for more than 50% of the global coin blank market. Wikipedia