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1920 CPO1+CPO3, comp. 2 pcs of p.stat for pneumatic-tube post, PC 140h issue Chainbreaker blue and letter-card 160h brown; Un, superb U:A5
PLATE PROOF value 140h for pneumatic tube postcard, comp. 3 pcs of typography plate proofs in/at blue (original), brown and orange color on/for white stamp paper with gum with wide margin; hinge / label, exp. Vrba U:A5
PLATE PROOF values 140h for pneumatic tube postcard, in black color, wide margins U:A5
1920 PLATE PROOF comp. 3 pcs of plate proofs values 140h and 160h in violet and blue color, 1x 140h on white paper with gum, other on/for rose carton paper, wide margins; exp. by Karasek and Vrba U:A5
