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desc_issuer: Czechoslovakia desc_denom: 20h desc_color: blgrn desc_perf: imperf Used by 1 overprinted stamp: Eastern Silesia postage 1920 20h blgrn issue=1920a d=Hradcany (1918) ovpt=SO//1920 oc=blk on=issuer=Czechoslovakia-20h-blgrn-imperf unwmk imperf Not used by any images. Matches 1 type: Czechoslovakia postage 1918 20h blgrn issue=1918a d=Hradcany (1918) unwmk imperf |