Great Britain 1877 £1 brown lilac Telegraphs, SGT17var.
Superb unmounted mint, with full original gum, left hand marginal imperforate block of four lettered AQ-BR overprinted "SPECIMEN" type 9.
A very rare multiple in this quality.
GB Specialised Catalogue No: L236t.
The Stanley Gibbons catalogue value is £5,200+.
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