Czechoslovakia 1918 Hradcany 50h imperf proof block of 15 in purple doubly printed with Newspaper Express 2h in lilac, on ungummed buff paper, as SG 11 & E24
Czechoslovakia 1918 Hradcany 50h imperf proof block of 15 in purple doubly printed with Newspaper Express 2h in lilac, on ungummed buff paper, as SG 11 & E24