Auction 321 - 332 Romania – Special Catalogue, Worldwide Rarities – The ERIVAN Collection – 2nd Auction, Schweiz & Liechtenstein - Day 5

1968: APOLLO 6, cover postmarked Kennedy Space Center, April 4, 1968, launch day of the Apollo 6 unmanned flight, illustrated Apollo-6 cachet in blue at lower left, signed by eighteen astronauts including Alan Shepard, as well as Neil Armstrong, Buzz Aldrin, and Michael Collins, an exceptional and rare cover.rnrnrn