The solid barrel rib has a single bead front sight and is marked "J. MacNaughton, EDINBURGH". The barrels feature 2 1/2 inch chambers, an extractor and full/improved modified chokes. The barrel flats are marked "550 28 [inside a diamond] 1 1/2 3 TONS PER NOT FOR BALL" and "27 SLEEVE" along with "crown/BNP" and "crown/GP" proofs. The receiver has a wavy line border engraving and scrollwork on the sides with the top of the receiver engraved "MACNAUGHTON" and "EDINBURGH" in separate banners. The water table is marked with the serial number and "crown/BNP" and "crown/V" proofs. The engraved scrollwork extends to the break lever and trigger guard. The action has double triggers and a tang safety. The break leaver has a cut-out enabling the cocking indicator window on the upper tang to be exposed. The cocking indicators are the hammers. The nicely figured forearm and straight grip stock are checkered with a horn forearm insert and checkered horn buttplate. The underside of the buttstock has a brass oval engraved with a griffin and a bird on top of a globe. Length of pull is 13 5/8 inches, .546 left bore, .547 right bore, .057 left barrel wall thickness, .057 right barrel wall thickness, drop at heel 2 3/4 inches, drop at comb 1 5/8 inches. The included takedown leather case has the initials M.B., brass hardware, red felt lining, a James MacNaughton paper label attached to the inside of the lid, two bore cleaning rod attachments and an oiler. Setting up business in Edinburgh in 1864, James MacNaughton received fame for the Lock Fast Breechloader and the Edinburgh Patent Hammerless Ejector.

Very fine as refinished. The barrels and trigger guard retain 98% of the blue finish with a couple spots of oxidation at the mid-point and some finished over pitting. The frame has a bright appearance. The wood is excellent with very limited minor handling marks, a small wood repair on the forearm and a couple small hairline cracks. The checkering is crisp overall. Mechanically fine. The case is very good.