Czechoslovakia 1918 Hradcany 200h imperf proof block of 4 in blue doubly printed with 20h in turquoise, on ungummed buff paper, as SG 7 & 13
Czechoslovakia 1918 Hradcany 200h imperf proof block of 4 in blue doubly printed with 20h in turquoise, on ungummed buff paper, as SG 7 & 13