1841 1d RED PLATE 11 TRIAL ON DICKINSON SILK THREAD PAPER - fine four margins, ungummed, with the 'silk' (really cotton) thread just visible from the front running very slightly diagonally down the right margin outside the printed design. 1990 RPSL cert; SG DP22 £7500. (Image)

1865 "ROYAL REPRINT" 1d BLACK - printed from plate 66, lettered CI imperf on inverted large crown watermarked paper; large margins, hinge remains. SG DP35a £3500. (Image)

1872 SOUTH KENSINGTON EXHIBITION PROOF 1d BLACK - printed from plate 27, lettered GJ imperf on thick white card; fine four margins. SG DP36 £2500. (Image)

1865 "ROYAL REPRINT" 1d ROSE-RED - printed from plate 66, lettered AE imperf on large crown watermarked paper; four margins, small pen? mark at top right. SG DP35b £3000. (Image)

1867 PARIS EXHIBITION PROOF 1d BLACK - printed from plate 103, lettered JD imperf on soft white card; fine four margins. SG DP38 £3000. (Image)

1867 PARIS EXHIBITION PROOF 1d ROSE-RED - printed from plate 103, lettered GH imperf on soft white card; adherence from old mounting on the back, else fine four margins. SG DP38 £3000. (Image)

1841 SMALL TRIAL TWOPENCE PLATE - single from the top of the sheet; light toning from a hinge in the upper selvedge, else fine. SG DP43 £1800. (Image)

1867 PARIS EXHIBITION PROOF 2d BLACK - printed from plate 9, lettered KB imperf on soft white paper; light soiling, hinge remains. SG DP49 £4000. (Image)

1867 PARIS EXHIBITION PROOF 2d BLUE - printed from plate 9, lettered JE imperf on soft white card; small area of surface disturbance on the back else fine four margins. SG DP49 £5000. (Image)