1965 space research issue of Czechoslovakia
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Short desc: 1965 space research
Issuer: Czechoslovakia Date: 3/15/1965 Consists of 7 stamps: (See stamps as list) 20h d=Maximum Sun-spot Activity perf=11.75x11.25 30h d=Minimum Sun-spot Activity - Quiet Sun perf=11.75x11.25 60h d=Moon Exploration perf=11.75x11.25 1k 1.40k d=Artificial Satellite and Space Station perf=11.75x11.25 1.60k d=Exploration of Mars 2k d=Soviet Kosmos and U.S. Tiros Satellites perf=11.75x11.25 |
