Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3
Saturday, October 29, 2022 at 3:00 PM UTC
Lot 1081:
1919, black overprint ”Poczta. Polska” on Austrian Emperor Karl I 15h dull red (overprint position I.6) and 20h dark green (position I.25), both with large part of OG, VF, expertized by H. Bloch, C.v. $370, Est. $150-$200, Sc. # 56-57
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