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1860 the first Polish stamp with rare railway mark
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1919 Cracow issue, stamp with rare double overprint
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1944 Neubrandenburg, unique 'Mermaid' stamp without overprint on letter
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1944 Wodzowie, set of rare triple proofs
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1919 provisional postage due stamps on mail stationery
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1950 unique block of four of postage due stamp design |