Air Mail unmounted mint -- 50p.indigo and green, a superb unmounted mint block of four from the top of the sheet. Very rare. S.G. 742, £6000. Photo | Christie's

Lot 2415

2415

Air Mail unmounted mint -- 50p.indigo and green, a superb unmounted mint block of four from the top of the sheet. Very rare. S.G. 742, £6000. Photo

Details

Air Mail unmounted mint -- 50p.indigo and green, a superb unmounted mint block of four from the top of the sheet. Very rare. S.G. 742, £6000. Photo