Uncommon unused United Arab Emirates (Sharjah) block of six stamps, 6.25 x 5.75, with designs honoring various NASA and Soviet Union space missions and explorers, signed in the upper border in black felt tip by Apollo 15 moonwalker Dave Scott, who also signs across the two middle stamps in black ballpoint. In very fine condition. Accompanied by a full letter of authenticity from Zarelli Space Authentication.
