Remarkable NASA-issued Omega Speedmaster Professional wristwatch. Black-faced with a stainless-steel bezel and bracelet, a solid case back with a blue removable protective cover, powered by a calibre 861-based movement. Engraved on the case back is, "Flight-Qualified by NASA For All Manned Space Missions / The First Watch Worn on the Moon." Label to case back marked: “48, 293 426.” Includes the original “JSC Project Parts Tag” dated January 4, 1996, with contract number “NAS9-17540” and serial number, “48293426.” In fine condition. Accompanied by a watch display stand with affixed label: “Omega Speedmaster Pro Chronograph, S/N 48293426, NASA issued with part tag, GA sold to Kansas Cosmosphere in 1998.” Intimately associated with the Apollo program, the Omega Speedmaster Moon Watch has become one of the most iconic timepieces ever created, with this example all the more desirable given that it directly originated from NASA.