James Murray, Duke of Atholl (1736-1765), Proof Penny, 1758, in silver, edge herring-bone right, 12.00g/2h (Prid. 15A; S 7411b). Extremely fine and attractively toned, very rare £1,000-1,500

Provenance: W. Cunningham Collection, Glendining Auction, 31 January-2 February 1951, lot 636; SNC June 1986 (4454); Spink Auction 188, 29 March 2007, lot 174