You did not check any search criteria, so I am displaying ALL the covers:
Number of cover matching : 10668 Page 227 /889
more info
ref
space event
date
USA 1492 A
STS ENTERPRISE (OV-101) - 1ST SPACE SHUTTLE - CONSTRUCTION & TESTS 10/12/1977 15,-
USA 1492 B
STS TESTS - CREWS OF THE APPROACH - LANDING TEST PROGRAM 10/12/1977 8,-
USA 1083
VIKING 2 ORBITER PROBE 10/15/1977 10,-
USA 1084
HELIOS 1 (HELIOS A) (SOLAR ORBITER) - PERIHELION 10/21/1977 8,-
USA 1085 A
ISEE 1 (EXPLORER 56) & ISEE 2 (SATELLITES) - DELTA 2914 10/22/1977 8,-
USA 1085 B
ISEE 1 (EXPLORER 56) & ISEE 2 (SATELLITES) - DELTA 2914 10/22/1977 16,-
USA 1085
ISEE 1 (EXPLORER 56) & ISEE 2 (SATELLITES) - DELTA 2914 10/22/1977 8,-
K 115
ISEE 1 (EXPLORER 56) & ISEE 2 (SATELLITES) - DELTA 2914 10/22/1977 27,-
K 115 A
ISEE 1 (EXPLORER 56) & ISEE 2 (SATELLITES) - DELTA 2914 10/22/1977 8,-
USA 1087
HELIOS 2 (HELIOS B) - SOLAR ORBITER - PERIHELION 10/26/1977 8,-
USA 1086 A
STS TESTS - ENTERPRISE OV-101 - ATMOSPHERIC FLIGHT 10/26/1977 16,-
USA 1086
STS TESTS - ENTERPRISE OV-101 - ATMOSPHERIC FLIGHT 10/26/1977 10,-