Mercury 7 Autographed Covers. Two covers, first cacheted cover from 1986 Sandical exhibition bearing 4c Mercury and 18c coil stamps tied by ""Old Town Philatelic Center, San Diego California 92110, Oct. 11, 1986" oval postmark which also ties label from International Aerospace Hall of Fame, signed by Scott Carpenter, Gordon Cooper, John Glenn, Wally Schirra, Alan Shepard, Deke Slayton and Betty (Mrs. Gus) Grissom, fresh and Very Fine, back of cover signed by creator of cachet design, ex Gruys, second a first day cover bearing 4c Mercury, tied by "Cape Canaveral Fla. Feb 20 1962 First Day of Issue" machine cancel, signed by Alan Shepard, Scott Carpenter, Wally Schirra, John Glenn, Gordon Cooper and Deke Slayton, missing only Gus Grissom, fresh and Very Fine

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