1905 (3rd Nov.) chemical experiments, an appendix sheet marked confidential from the De La Rue Day book signed by Hugo Muller (De La Rues consulting chemist), showing three vertical columns of different coloured Victoria head dummy stamps, the first colum (Image)

1862-64 Small Uncoloured Corner Letters. 1862 6d lilac pl.3 BG imperforate imprimatur, mint o.g., very scarce being one of only 25 taken from the sheet. (Image)

1865-67 Large Uncoloured Corner Letters, Wmk Large Garter & Emblems. 1865 3d rose pl.5 AF, marginal imperforate imprimatur from the top of the sheet, rare "abnormal" that was never issued on emblems paper, being one of only 23 possible examples. (Image)

1873 4d vermilion pl.11 QK/RL, a very fine and fresh block of four with large part original gum, showing an unusual paper flaw caused by superfluous material on the printing plate, a scarce multiple; cert RPS (1989). (Image)

1865 6d lilac pl.6 TJ imperforate imprimatur, original gum, very fine and rare with only 21 possible examples; ex Dr. Serval (1976). (Image)

1867-80 Large Uncoloured Corner Letters, Wmk Spray of Rose. 1867-80 De La Rue 3d die proof in black on glazed card, 92x60mm, with void corner letters and plate numbers, endorsed "BEFORE STRIKING", dated "Oct 1, 1872" and initialled in pencil; ex Douglas Latto. (Image)

1867-83 High Values. 1878 10s De La Rue die proof in black on white glazed card, 92x60mm, dated "Apr 30, 1878", very fine and rare. (Image)

1878 10s De La Rue die proof printed in black on glazed card (91x60mm), dated "May 2, 1878", scarce. (Image)

1878 10s De La Rue die proof printed in black on glazed card (61 x 92mm), dated "May 3, 1878", very fine and scarce. (Image)

1867-83 £5 orange BG on blued paper overprinted "SPECIMEN" (type 9), large part o.g. marginal example from the foot of the sheet, a lovely fresh example. (Image)

1867-83 £5 orange DK on white paper, bold central Chester cds, very fine (S.G. £3'500). (Image)

1873-80 Large Coloured Corner Letters, Wmk Small Anchor & Orbs. 1873-80, 2 1/2d rosy mauve pl.4 imperf. imprimatur, mint h.r., good margins, very fine, one of only 22 possible examples of which many are in institutional collections. (Image)

1878 6d. Grey, SG, Pl. 16, imperforate imprimatur, good to large margins all round, very rare with only 22 examples removed from the sheet. (Image)

1878 (Feb 1) entire from London to Dominica with 1873-80 1s wing marginal tied by London "78" "L1" duplex, Dominica arrival bs, some insignificant soiling, fine and scarce destination. (Image)

1877 4d. sage-green, Pl. 15, SI-TL imperforate marginal block of eight from the lower right corner of the sheet, showing current number "428", each stamp overprinted "SPECIMEN" (type 9), TK additionally showing large "5" in "15", a magnificent and unique (Image)

1876 8d orange GE, a very fine and fresh well centred example large part o.g., lovely vivid colour, very scarce so fine (S.G. £350). (Image)

1880-81 Provisional Issue and 1881 1d Lilac. 1880-81 5d indigo mint n.h., very fine and fresh (S.G. £725 for n.h.) (Image)

1901 1d. die proof of issued design in black on glazed card (60 x 90mm.) marked "AFTER STRIKING" and dated "22 JAN 01" in blue, additionally initialled and dated. Scarce. (Image)

1881 1d perforated colour trial in greenish-slate on pink, very fresh, attractive and rare (S.G. from £3'000). (Image)

1881 1d perforated colour trial in purple on pink, very fresh, attractive and rare (S.G. from £3'000). (Image)

1881 1d perforated colour trial in purple on pink, very fresh, attractive and rare (S.G. from £3'000). (Image)

1881 1d perforated colour trial in dull carmine on white paper, very fresh, attractive and rare (S.G. from £3'000). (Image)

1881 1d perforated colour trial in carmine on white paper, very fresh, attractive and rare (S.G. from £3'000). (Image)

1881 CONFIDENTIAL. "A Brief Description of Thos. De La Rue & Co's, Fugitive and Doubly Fugitive Adhesive stamp Printing Inks" leaflet including a full explanation (simply put, fugitive inks showed fugitivity to solvents and doubly fugitive to water-based (Image)

1880-83 Large Coloured Corner Letters, Wmk Imperial Crown. 1880-83 6d grey pl.18 in mint right marginal block of eight, light hinge traces with four stamps mint n.h., very fine and fresh multiple (S.G. £3'200+). (Image)