Specimen Block of Four ½d. and 1d. imperforate overprinted "SPECIMEN" (type 26), two blocks of four of each value in slightly different shades (one block of each value being top marginal), mint with almost full original gum or unmounted; a few minor gum wrinkles as usual, fine. S.G. Spec. N14u, N16u, £680+

Details
Specimen Block of Four ½d. and 1d. imperforate overprinted "SPECIMEN" (type 26), two blocks of four of each value in slightly different shades (one block of each value being top marginal), mint with almost full original gum or unmounted; a few minor gum wrinkles as usual, fine. S.G. Spec. N14u, N16u, £680+
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