1904 KEVII £25 green & violet, wmk Mult Crown CA, imperf color trial proof. Superb fresh UN with partial gum, 4 large even margins. Sc 18A(p), SG 19(p) cat £75,000 for normal. The Northern Nigeria £25 is the rarest high denomination stamp of all the 20th century keyplate issues of the British Empire with less than 10 mint examples recorded of the issued stamp. Even as a color trial proof, it is a great rarity as only one of each has been recorded of a small number of different colors. Certificate can be obtained on request. (P) (Image1)

Estimate AU$15,000