Astronaut Rick Mastracchio's flown Omega Speedmaster Professional X-33 analog-digital chronograph wristwatch, serial no. 90957461, used aboard the Space Shuttle Discovery and International Space Station during STS-131. In fine condition, with light wear from use. Accompanied by a certificate of authenticity signed by Mastracchio, in part: "This Omega Speedmaster Chronograph No 90957461 was used by lead space walker Rick Mastracchio during Space Shuttle Discovery Mission STS 131 and has been part of his personal collection since he returned to Earth. This item is one of the rare artifacts to launch into orbit and used on the International Space Station. Space Shuttle Discovery STS 131 launched on April 5th, 2010 from the Kennedy Space Center and returned April 20th. The crew worked in space for 15 days, 2 hours, orbiting the Earth 238 times and traveling more than 6,230,000 miles at 17,500 mph."
Complete with its original white padded case within the Omega box (signed on the cover in black felt tip, "Flown on STS-131, Rick Mastracchio"), matching "International Warranty" and "Pictograms" cards, photographs of Mastracchio wearing the watch during the mission and of the watch floating in the microgravity environment, an embroidered STS-131 patch flown on the mission (initialed and flight-certified on the reverse in black felt tip, "Flown, RM"), and an additional handwritten note: "Enjoy the watch. I wore it on STS-131 and it served me well…I also included an STS-131 patch to go with it. All flown on STS-131!").
Consignor notes that he purchased the watch directly from Mastracchio about ten years ago; at the time, the astronaut related that the caseback is unusual as it lacks the Omega logo and engraving. He received the watch just a few days before the launch of STS-131, and the standard caseback was evidently out of stock at the time. Notably, the watch is depicted in the article 'The March of Time,' covering the history of the Omega Speedmaster X-33, and in the book 'Une Montre Sur La Lune.'
Though most famous for the Speedmaster 'Moon Watch' used during the Apollo era, Omega's space heritage continued during the late 1990s with the Speedmaster X-33—a watch with modern amenities including a hybrid analog-digital display. In addition to the traditional hours, minutes, and seconds indicated by analog means, the digital portion offered extensive functions including universal GMT time, a perpetual calendar, and a chronograph.
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