Czechoslovakia 1918 Hradcany 25h imperf proof block of 4 in blue doubly printed with 20h in turquoiae, on ungummed buff paper, as SG 7 & 8
Czechoslovakia 1918 Hradcany 25h imperf proof block of 4 in blue doubly printed with 20h in turquoiae, on ungummed buff paper, as SG 7 & 8