CZECHOSLOVAKIA (1962) Man before cosmos*: sun*, planets*, stars*, rocket*, atomic symbol*. Die proof in black. Space research. Scott No 1105. Yvert No 1208. Czechoslovakia Die Proofs are rare with usually no more than one to five copies printed.
AVAILABLE AT $175
CZECHOSLOVAKIA (1967) Ondrejov observatory*. Galaxy*. Series of 3 die proofs showing various stages of printing. Scott No 1489. Czech proofs are very rare - only 2-5 were ever made! File holder punches at top.
AVAILABLE AT $225
CZECHOSLOVAKIA (1969) Milan Stefanik*. French General*. Die proof in blue. Scott No 1625. Czech proofs are very rare - only 2-5 were ever made!
AVAILABLE AT $175
CZECHOSLOVAKIA (1970) Maximilian Hell*. Die proof in black signed by the engraver. Hell was a Jesuit and published one of the early "Ephemerides" and made observations on the transit of Venus in 1769. Scott No 1670, Yvert No 1768. Czech proofs are very rare - only 2-5 were ever made!
AVAILABLE AT $225
MALI (1980) Kepler*. Die proof in black signed by the engraver MONVOISIN and also by the designer!. Scott No C388, Yvert No PA386.
AVAILABLE AT $160