Czechoslovakia 1968 'Praga 68' Stamp Exhibition (3rd Issue) set of 6 unmounted mint, SG 1743-48
Czechoslovakia 1968 'Praga 68' Stamp Exhibition (3rd Issue) set of 6 unmounted mint, SG 1743-48
Czechoslovakia 1968 'Praga 68' Stamp Exhibition (3rd Issue) set of 6 unmounted mint, SG 1743-48