Great Britain 1855 1d red brown Plate 15 imprimatur, SG24var

Great Britain 1855 1d red brown Plate 15, SG24var.

The unique unused four margin top right hand corner marginal imperforate imprimatur showing plate number "15" and part sheet inscription, lettered AL.

Provenance: Ex Earl of Crawford & Ex Colonel Bates (1934) collections.

A key and splendid quality rarity from the very first approved printing sheet.

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