A 1923-S Peace Dollar, which sold for $31,070 in the recent Heritage Grand Format Air and Space Auction has been certified, graded and sealed by NGC.  

"Normally, the 1923-S Peace Dollar is a fairly common coin," said Tom Slater, Director of Americana Auctions for Dallas-based Heritage Auction Galleries, "but this particular coin is truly one-of-a-kind. It was part of the material that Buzz Aldrin, the second man to walk on the surface of the moon after Neil Armstrong, took with him in his Personal Preference Kit (PPK). Dr. Aldrin himself consigned this coin to our recent auction, so its provenance is impeccable. There have been a number of specially-produced medals that have been space-flown, but the number of actual coins to attain this lofty pedigree is astronomically smaller." 

"This coin sold in our recent auction for $31,070," Slater said, "about 2,000 times as much as a regular, heavily circulated 1923-S dollar would have brought. To make sure this treasure is properly documented, it’s been certified and encapsulated by NGC, one of the foremost coin graders in the world, complete with the notation, ‘Flown on the Moon Mission Apollo 11 / July 16-24, 1969 / Dr. Buzz Aldrin.’ This will certainly remain an important memento of man’s first tentative steps into outer space, a touchstone to the stars for all earthbound mortals."  

More information and an image of the encapsulated coin may be seen at Heritage Auctions.