A graphite pencil “X” made with a flown silver pencil carried on board the Apollo 15 mission. Mark is made on a 3.5 x 2 card, which reads, in part: “The affixed letter X…was made with a Silver Pencil (Serial Number SEB 12100081-301 S/N 1019), utilizing the original graphite that was carried on board the Apollo 15 mission.” In fine condition. Accompanied by two photocopied letters of authenticity from Irwin stating the pencil was carried to the moon.
