One Guinea, 7 May 1787, no. 103/324, watermarked paper, signed by John Maston and David Walker (Douglas 1). A 15mm split in left edge and a 10mm split at bottom, a couple of tiny holes, otherwise very fine, rare (£1,200-1,500)

Illustrated on the front cover. The bank opened for business on 6 May 1787 and traded until merging with the Union Bank of Scotland in 1857