This is a rare set commemorating the successful joint space mission "Apollo-Soyuz Test Project" conducted by the United States and the Soviet Union in July 1975 in the United States. The set includes a special silver medal and stamps issued by both countries depicting the moment of docking, with commemorative stamps. ◉ Silver Medal 　Dimensions: Diameter 38.5mm 　Weight: 21.5g 　Silver Purity: .925 (Sterling Silver) 　Mintage: Approximately 117,100 sets 　Issuer: The Franklin Mint Type: Other Main Material: Silver