1841 2d blue trial, top left hand corner marginal pair from the trial sheet of twelve with blank corner letters, produced for application to postal notices informing Postmasters of the forthcoming issue, fine and scarce. Spec. DP43 | Estimate - £1200-£1500 (Image)

1850 1d "Prince Consort'' essay (FJ) imperforate in black prepared by Henry Archer in his bid to obtain the contract to print and perforate the surface-printed postage stamps on more favourable terms than Perkins Bacon; a most fine and interesting piece of 'Line-engraved' history despite it being surface-printed. SG DP71(2) | Estimate - £1000-£1200 (Image)

1883 4d die proof in black on white glazed card (92 x 60mm) dated ''13 JUL 83'' and endorsed ''BEFORE HARDENING'', fine and scarce. SG 192var | Estimate - £300-£400 (Image)

1892 4½d perforated colour trial with head plate in mauve and duty plate on carmine on gummed Crown wmkd paper, fine o.g.; very scarce. SG 206var, ex Verus | Estimate - £800-£1000 (Image)

1899 Jubilee 2d colour trial with purple head and duty plate in sage-green, fine o.g; slight horizontal crease, still fine. SG 200var | Estimate - £300-£400 (Image)