Inter Space covers exist for at least the early-mid 70s period and I believe were produced by Robert Rank for the European market (?). Note the cachet designs are identical to many ‘Space Voyage’ covers. My very small collection is shown below.
Nato B – 3nd Feb 1971:
Explorer 43 – 13th Mar 1971:
USAF AECS – 20th Mar 1971:
ISIS 2 – 31st Mar 1971:
Midas 11 – 5th May 1971:
Mariner 8 – 10th May 1971:
Mariner 9 – 30th May 1971:
Solrad 10 – 9th Jul 1971:
OV-1 20 & 21 – 6th Aug 1971:
German / USA MPE Barium Ion Cloud – 21st Sep 1971:
OSO 7 – 29th Sep 1971:
FR-USA Experiment – 17th Oct 1971:
ITOS B – 21st Oct 1971:
DSCS II 1 & 2 – 2nd Nov 1971:
Mariner 9 Orbits Mars – 13th Nov 1971:
Explorer 45 – 15th Nov 1971:
USAF R& D Midas [FAILURE] – 6th Dec 1971:
Intelsat IV – 19th Dec 1971:
Apollo 15 Launch – 26th Jul 1971:
Explorer 47 Launch – 22nd Sep 1972:
Army RADCAT / Radar Calibration Target – Vandenberg Air Force Base CA – 2nd Oct 1972:
Big Bird 4 / Project 467 – Vandenberg Air Force Base CA – 10th Oct 1972:
NOAA 2 / ITOS-D / Oscar 6 – Vandenberg Air Force Base CA – 15th Oct 1972:
NASA 102nd LB Test M2F3 Lifting Body – Edwards CA – 1st Nov 1972:
Code 417 ‘Classified’ / Meteorological Satellite USAF – Vandenberg Air Force Base CA – 8th Nov 1972:
Canadian Comsat / Anik 1 – Cape Canaveral FL – 9th Nov 1972:
ESRO IV Satellite – Vandenberg Air Force Base CA – 21st Nov 1972:
Apollo 17 Moon Orbit – Cape Canaveral FL – 10th Dec 1972:
Apollo 17 Cape Canaveral FL – 12th Dec 1972:
AEROS 2 – Vandenberg Air Force Base CA – 16th Dec 1972:
USAF ‘Program 313’ / R&D Data Relay – Cape Canaveral FL – 21st Dec 1972:
Pioneer 10 Leaves Asteroid Belt – Cape Canaveral FL – 15th Feb 1973:
Pioneer 11 Launch – Cape Canaveral FL – 6th Apr 1973:
Skylab SL-1 Launch – 14th May 1973:
Skylab SL-2 Launch – 25th May 1973:
Skylab SL-2 Docking – 25th May 1973:
Skylab SL-2 Sunshade – 26th May 1973:
Skylab SL-2 Splashdown – 22nd Jun 1973:
Skylab SL-3 Launch – 28th Jul 1973:
Skylab SL-3 Docking – 28th Jul 1973:
Skylab SL-3 Spacewalk – 6th Aug 1973:
X-24B Second Glide Flight – 17th Aug 1973:
Skylab SL-3 Splashdown – 25th Sep 1973:
Skylab SL-4 Launch – 16th Nov 1973:
Skylab SL-4 Splashdown – 8th Feb 1974:
