Extremely desirable flown embroidered 'Grumman' Apollo 10 mission insignia patch carried to the moon on Apollo 10, measuring 4 x 4, 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 'Grumman' Apollo 10 Embroidered Mission patch that accompanies this letter was flown to the Moon aboard the Apollo 10 mission May 18-26, 1969. It has been a part of the John W. Young collection since returning from 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 provided to the crew by Grumman to be flown as souvenirs. A handsome 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.