Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3
Lot 1090:
1945, Postal Worker’s Convention at Poznań, 1+5zl green, left sheet margin imperforated single (full OG, NH) and left sheet margin vertical imperforated pair with parts of adjoining stamps at right (Kraków 12.9.45 cancellation), both are VF, Est. $150-$200, Sc. # B40 imp
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