Dhufar 1973 Foreign & Exotic Birds 20b (Kookaburra) set of 7 imperf progressive colour proofs comprising the 4 individual colours plus 2, 3 and all 4-colour composites, unmounted mint
Dhufar 1973 Foreign & Exotic Birds 20b (Kookaburra) set of 7 imperf progressive colour proofs comprising the 4 individual colours plus 2, 3 and all 4-colour composites, unmounted mint