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desc_issuer: Czechoslovakia desc_year: 1918 desc_denom: 20h desc_color: bis Related descs: issuer=Czechoslovakia-1919-2h Used by 1 overprinted stamp: Eastern Silesia postage due 1920 20h bis ovpt=SO//1920 oc=blk on=issuer=Czechoslovakia-1918-20h-bis unwmk imperf Not used by any images. Matches 1 type: Czechoslovakia postage due 1918 20h bis issue=1918 due unwmk imperf |