Description
Great Britain 1924 10d turquoise-blue, SG428var.
A very fine unused example with original gum overprinted "SPECIMEN" type 32.
A very rare King George V Specimen example, which was used solely by postal administrations as reference to help detect any attempted forgeries.
GB Specialised Catalogue No: N44u
The Stanley Gibbons catalogue value is £2,250.
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