Don’t really know anything about these 5th Anniversary covers, but would love to know who made them and if there are any more that I don’t show here ?

Samos II – 31st Jan 1966
Transit IV-A / Greb III / Injun – 29th Jun 1966
Discoverer XXVI – 7th Jul 1966
Tiros III – 12th Jul 1966
Explorer XIII – 25th Aug 1966
Midas IV – 21st Oct 1966

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WANTED: