Philatelic souvenir, 5.25 x8.25, honoring Brien McMahon, with a commemorative postage stamp at top, along with a July 28, 1962, Norwalk, Connecticut postmark. Signed in ballpoint and felt tip by crew members Paul Tibbets, Jacob Besser, George Caron, Richard Nelson, and Theodore Van Kirk. All but Van Kirk have also added their flight assignments. In fine condition. RRAuction COA.