British Linen Company, Proof 100 on Indian paper, Edinburgh, 1 November 1864, black and white, circular vignette of Britannia left centre, arms top centre, value in black underprint top left and right, 'pay to William Spence' in text at centre (Douglas 31), 'To this 19th Oct 1864' in pencil in low right field, a Perkins Bacon engraving, about extremely fine, rare