Oman 1974 Tropical Fish 3b (Angel & Butterfly Fish) set of 5 imperf progressive colour proofs comprising 3 individual colours (red, blue & yellow) plus 3 and all 4-colour composites unmounted mint
Oman 1974 Tropical Fish 3b (Angel & Butterfly Fish) set of 5 imperf progressive colour proofs comprising 3 individual colours (red, blue & yellow) plus 3 and all 4-colour composites unmounted mint