sheet (163x296mm.) dated "9th January 1908" bearing thirteen 1d. colour trials, all but three on coloured papers, the one in purple on yellow marked "Approved for 3d, WHM, 13.1.08" and with the issued stamp mounted alongside; a vertical crease does not affect any trial. Most colourful. Photo" /> Proof <I>"Appendix"</I> sheet (163x296mm.) dated<I> "9th January 1908"</I> bearing thirteen 1d. colour trials, all but three on coloured papers, the one in purple on yellow marked<I> "Approved for 3d, WHM, 13.1.08"</I> and with the issued stamp mounted alongside; a vertical crease does not affect any trial. Most colourful. Photo | Christie's