1918-1920[COLLECTIONS] PLATE PROOFS selection of 75 pcs of PLATE PROOF, Hradčany 20x mainly black prints + block of four 50h violet with control-numbers, issue Chainbreaker 17x, Pigeon-issue 10x, Express, Postage due stmp, Newspaper stamps, black prints also color, paper chalky, ordinary and color, c.v.. ca. 6.600Kč