Apollo 15 Commander David Scott's Bulova Chronograph Wristwatch

The third most expensive space travel memento in this list is David Scott’s Bulova Wristwatch. The Bulova watch worn by Apollo 15 commander David Scott during NASA's fourth successful lunar landing mission in 1971 was sold for an astonishing $1.625 million by RR Auction of Boston to an unknown Florida businessman. The auction, which began on Oct. 15 with a starting price of $50,000 and culminated Thursday evening with a live auction in which the winner and his competing bidders participated by phone.

NASA gave the Apollo astronauts Omega Speedmaster timepieces to wear on their missions in the 1960s. Scott wore the Omega on his first two moonwalks, when he became the first person to operate a car on the moon, the lunar roving vehicle. The crystal that covered the Speedmaster's face popped off and was lost during his second outing. Scott had a Bulova wristwatch among his personal belongings, which he collected and put on for his third and final moonwalk.

Price: $1.625 million