Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 1
Lot 338:
1943, Flag of Czechoslovakia, 5c blue violet, blue, red and black, double impression of ”Czechoslovakia”, full OG, NH, VF, a copy of PF certificate for block of 20, stamp position mentioned, C.v. $600, Est. $200-$300 , Sc. #910a
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