1991 PLATE PROOF Pof.2998, Utamaro 7Kčs, plate proof gravure in/at definitive colour joined printing on/for chalky carton without gum, wide margins, signed Herčík; very fine
1992 PLATE PROOF Pof.3002, Comenius 10Kčs, plate proof original gravure in black color on/for carton with wide margin, signature Herčík; without defects
1992 Pof.3029 production flaw, Day Czechosl. stamps 2Kčs, L upper corner blk-of-8, production flaw - zesílená, light and variously smudge numeral value on/for seven stmp (every little other), only pos. 2 almost normal; very decorative production defect, also with corner stmp with incomplete printing "é" in/at "Czechoslovak"; on request exp. labour