Czechoslovakia 1968 'Praga 68' Stamp Exhibition (4th Issue) set of 6 unmounted mint, SG 1749-54
Czechoslovakia 1968 'Praga 68' Stamp Exhibition (4th Issue) set of 6 unmounted mint, SG 1749-54
Czechoslovakia 1968 'Praga 68' Stamp Exhibition (4th Issue) set of 6 unmounted mint, SG 1749-54