1840 1d Black Pl.1b (Wmk. Inverted). Very fine used four margin example of this scarce watermark variety lettered RE, neatly cancelled by ared MC. Scarce. Spec. AS5l. (Image)

1840 1d black Plate 1b (MB), four good margins, struck by red MC, fine. SG 2 (Image)

1840 1d black Plate 1b (NJ) four good margins, part o.g. with vertical crease and ink stain, still largely fine appearance. SG 2  (Image)

1840 1d black Plate 1b (QBI), four good margins, large part o.g. minor vertical gum crease, otherwise fine, still an attractive item. SG 2, £12,500 (Image)

1840 1d black Plate 1b (QI), four good, struck by neat red MC, fine. SG 2  (Image)

1840 1d black Plate 1b (SB), close to good margins, 'WATERMARK INVERTED' neatly cancelled by crisp red Maltese Cross. Fine. SG2wi (Image)

1840 1d, plate 1b (IH), good to large margins, with ‘INVERTED WATERMARK’, cancelled by neat part orange-vermilion Maltese Cross. A most attractive example. SG 2Wi, £2,500 (Image)