Great Britain 1924 4d grey green (printed on the gummed side) printing variety, SG424a.
A superb unmounted mint, with full original gum, example of this very rare King George V printing variety.
The first time we have handled this philatelic rarity and the finest example we have seen in 25 years.
GB Specialised Catalogue No: N39(2)b.
SG Catalogue Value: £5,250.
