Several punt guns were sold by auction on July 29 2009 by Bonhams, London. Lots 122,A 7 Bore Percussion punt gun,with 60 inch barrel, sold for 264 pounds.Lot 123 A 2 bore percussion punt gun with 75 1/2 inch barrel sold for 720 pounds. The basic design features/ profile of these guns is very similar to the Flint lock gun pictured in this post. These guns were the property of the late; Squadron Leader Michael Townsend, who according to the catalogue, was a keen wildfowler and punt gunner.
The book,"Letters To Young Shooters",Third series, by Sir R. Payne-Gallwey,contains a detailed treaties on the punt gun, entitled, Stanchion-Gun Shooting.
