Czechoslovakia 1976 Air 'Praga 78' Stamp Exhibition (!st issue - Architecture) perf set of 6 unmounted mint, SG 2286-91
Czechoslovakia 1976 Air 'Praga 78' Stamp Exhibition (!st issue - Architecture) perf set of 6 unmounted mint, SG 2286-91
Czechoslovakia 1976 Air 'Praga 78' Stamp Exhibition (!st issue - Architecture) perf set of 6 unmounted mint, SG 2286-91