Very desirable flown embroidered ‘Post-Flight’ Apollo 10 mission insignia patch carried to the moon on Apollo 10, measuring 4 x 4.5, encapsulated in a tamper-proof sleeve and affixed to a certificate of authenticity signed by Susy Young, the wife of the late Command Module Pilot John Young, in part: "I hereby certify that the Apollo 10 ‘Post-Flight’ Embroidered Mission patch that accompanies this letter was flown to the Moon aboard the Apollo 10 mission May 18-26, 1969. This patch was a part of John W. Young’s personal collection since the mission." In fine condition. These attractive patches, which vividly portray the Grumman-made LM firing its thrusters as it prepares to dock with the Rockwell-made CSM, were worn on post-flight jumpsuits and flown as souvenirs. An uncommon example from the collection of the prolific American astronaut, who went to the moon on Apollo 10 and walked upon the lunar surface on Apollo 16.