Oversized commemorative cover, 9 x 6, with a cachet honoring the envelopes that flew aboard the CSM Columbia during the Apollo 11 mission, with metallic 'First Man on the Moon' plate affixed to lower right, signed in black ink, "Neil Armstrong," and in blue ballpoint, "M. Collins." In very good to fine condition, with toning to the bottom and right side. Accompanied by a full letter of authenticity from Zarelli Space Authentication.