Great Britain 1840 1d Black Plate 1, 1a and 2d blue Plate.1. SG2/5 Pl1.Great Britain 1840 1d Black Plate 1, 1a and 2d blue Plate. 1, SG2 5. Superb combination entire envelope bearing two 1d black plate 1a lettered GC and FK and a 2d blue Plate 1 lettered AC each neatly cancelled by a crisp red Maltese Cross. Sent from London to Manchester with a London circular date stamp on reverse for MY. 28. 1840 then redirected (as requested in the contents of the letter) without further postage to Ashgrove, Herts. A magnificent 4d