Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3
Lot 1087:
1945, black surcharges ”Poczta Polska. 50gr” on stamps of Generalgouvernement 6gr-48gr, set of eight and 6 proofs of the same surcharge on 60gr, 80gr and two of each on 1zl and 1.20zl with perforation 12½ and 13¾x14, all are unused, no gum, looks VF, S. Mikstein hs on each value, Fischer #VIII/XXb, Est. $500-$600
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