Rare flown SpaceX sterling silver coin that was carried to the International Space Station (ISS) as part of MISSE-FF and the inaugural set of experiments, called Materials International Space Station Experiment-9 (MISSE-9), which were launched during the SpaceX CRS-14 mission on April 2, 2018. This coin, No. 20, was one of 50 included with the MISSE-9 and deployed (opened to space) on April 19, 2018. The coins were returned to Earth as part of the SpaceX CRS-17 mission on June 3, 2019. As such, the coins traveled over 176 million miles during their flight, logged approximately 6,704 orbits, and spent over 14 months in space. The coin, 1.5˝ in diameter, 31 gm, features embossed images of the six Space Shuttle orbiters— Enterprise, Columbia, Challenger, Discovery, Atlantis, and Endeavour—with a capsule to coin center containing flown material from all six Space Shuttles. Attractively framed to an overall size of 7 x 9.
