Great Britain 1902 1s dull green & carmine Board of Education Official, SGO87var.
Superb unmounted mint with full original gum example of this great departmental rarity overprinted "CANCELLED" type 18.
Unique in private hands and one of the greatest rarities of GB philately.
GB Specialised catalogue No: MO27t.
Provenance: Ex. National Postal Museum Archive Sale & "Minoru", one of the most prestigious King Edward VII collections ever assembled.
The Stanley Gibbons catalogue value is £75,000.
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