Flown silver-tone Gemini 10 Fliteline medallion, 1" in diameter, with the front featuring a raised design of the mission insignia with astronaut surnames ("Young / Collins"), and the reverse engraved with the mission name and date, "Gemini 10, July 18-21, 1966." Displayed in a 24K gold bezel. In very good to fine condition, with some light tarnishing. Consignor notes that this originates from the collection of Jim Rathmann, the owner of a Chevrolet-Cadillac dealership in Melbourne, Florida, who famously procured the Corvettes favored by the astronauts.