Great Britain 1880 2½d blue Plate 20 imprimatur, SG142var

GREAT BRITAIN 1880 2½d blue Plate 20 imprimatur, SG142var.

A very fine unused, with original gum, imperforate imprimatur lettered 'AG'.

Very rare, one of only 22 possible examples, several of which are in institutional collections.

Stanley Gibbons catalogue value: £2,500.

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