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1975 NEPŘIJATÝ NÁVRH plate proof refused design/sketch on stmp 5. BIB Bienále in Bratislava 40h, print complete gravure in/at only black color on lightly yellowy paper without gum, author Mráček U:A5
1978 Herčík J.: PLATE PROOF refused designes on/for post. stamp. Bulgaria, comp. 3 pcs of plate proofs - copy-print gravures in blue color, 2x definitive making and 1x semifinished gravure, all on/for white carton with signature of author U:A5
1980-1986 HERČÍK J.: comp. 5 pcs of various 1-barevných plate proofs - copy-print gravures to philatelic exhibitions and veletrhům ESSEN 1980 (2 pcs of), WIPA 1981, PHILEXFRANCE 1982 and STOCKHOLMIA 1986, issued for want PZO ARTIA; all PLATE PROOF on/for strong carton paper, 1 pcs of with signature of author U:A4
1964-1976 HERČÍK J.: realizované designs for foreign post. správy: and) LIBYA, PLATE PROOF Mi.151, Day women 10M, plate proof - print definitive gravure in/at different colors, on/for smooth paper without gum; b) KUWAIT, PLATE PROOF Mi.672, Day světového health/salutes 20F, plate proof complete gravure in violet color /without ofsetu/, on/for strong white carton U:A5
