[APOLLO 15]. FLOWN CREW SIGNED "PHASES OF THE MOON" POSTAL COVER

FLOWN phases of the moon postal cover, 3 ½ by 5 ½ inches, with 8 cent USPS stamp with circular launch day postmark dated July 26, 1971, and se-tenant pair of 8 cent  "United States in Space... | A Decade of Achievement" stamps with U.S.S. Okinawa cancellation dated August 7, 1971. With red and blue sticker applied to upper left showing fifteen phases of the moon, SIGNED at lower left by DAVE SCOTT, AL WORDEN, and JIM IRWIN; green "Recovery" cancellation to Verso, with "Winnick" stamp to lower right, accompanied by Lester E. Winnick certificate of authenticity number S-122.