http://www.invaluable.co.uk/auction-lot/1855-58-blued-paper-no-wmk-imperf-1d-red,-just-co-1194-c-a0943b78031855-58 blued paper no wmk imperf 1d red, just complete margins, unused - has been expertised on reverse, SG.4. Very rare. (1) Cat. £12,000.
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