Provincial Bank of Ireland, General Issue, Proof £1, 1 October 1872, on unwatermarked paper, by Perkins Bacon and Co, London, portrait of Victoria in floral wreath top left, Britannia and Hibernia seated top centre, ONE in underprint at centre (cf P.A100), printer's annotation in pencil low right "To this 14th Augt 1872", mounting traces, about extremely fine