Great Britain 1840 1d Black Plate 1b. SG2Great Britain 1840 1d Black Plate 1b, SG2. A very fine entire penny black cover sent from Manchester to Wigtown bearing a good to large four margin example lettered NB neatly tied by a red Maltese Cross, endorsed at top left in manuscript 'MISSENT TO' with a Wigton circular dated stamp alongside for AU. 13. 1840. Backstamped by a Manchester dispatch circular date stamp for AU. 12. 1840. A most attractive and unusual cover bearing the world's first