Check the listing for details. 1988-P Bronze Space Shuttle Medallion. Condition: Used. Listed at 12.00 USD. Item: 1988-P "America in Space" Bronze Medallion Mint: Philadelphia (P) Theme: Space Shuttle / Young Astronaut Program Designers: Erac Priester (Obverse) and Robert Ahlcrona (Reverse) Specifications: Diameter: 1.5 inches (38mm) Weight: 25 grams Composition: 90% Copper / 10% Zinc Condition: Brilliant Uncirculated (BU). This medallion features a crisp strike with sharp details of the Space Shuttle on the obverse and the Young Astronaut emblem on the reverse. It is currently housed in a clear protective acrylic capsule to maintain its original luster. Historical Significance: This piece was authorized by Congress and released by the U.S. Mint to coincide with the launch of the Shuttle Discovery in late 1988. The design was chosen from over 17,000 student entries.