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Auction: 12021 - The Chartwell Collection - GB Line-Engraved Essays, Proofs, Stamps and Covers - Part IV
Lot: 106

Great Britain
1840 One Penny Black
Imprimaturs
Plate III, TL with corner sheet margins showing the plate number "3" and margin inscription, "... ove the Cement", the other margins are exceptionally large; some thinning under some old hinge remnants, nevertheless fine and a highly important positional stamp of the utmost rarity and the only plate number imprimatur available in private hands from this plate

Estimate
£120,000 to £150,000