Flown sterling silver Apollo 10 Robbins Medal, approximately 1.25 x 1.25, with a raised design on the face of the mission insignia and the last names of crew members Tom Stafford, John Young, and Gene Cernan. The reverse of the sterling silver medal is engraved “May 18–26, 1969” and serial numbered “252.” Normal condition. This item originated from the collection of Charles Conrad and is accompanied by a letter of authenticity from Conrad, which reads: “This medallion, Serial No. 252, was carried aboard Apollo 10 by astronauts Tom Stafford, John Young, and Gene Cernan in March of 1969. It has been in my personal collection since.” RRAuction COA.