A Huge .577 Calibre Percussion Pepperbox by J. Harper of London. With fluted barrel block engraved with bands of foliage at the muzzle and numbered 1 to 5 stamped with London proofs, foliate scroll engraved rounded steel action with nipple-shield, fitted with sliding safety catch that also locks the hammer, deeply chequered walnut butt with vacant oval escutcheon, foliate engraved butt cap with hinged butt trap, foliate engraved trigger guard. 

Harper, James [1850-1865]

Made percussion pepperboxes and flat bar hammer percussion revolvers. Shop at 85 Weyman Street, London. 

A. Merwyn Carey (1954) English, Irish and Scottish Firearms Makers, Acro Publishing Company, New York. 

Dimensions: 

Bore: .577 Calibre / 25 Bore

Barrel Length: 5.5 Inches (14 cm) 

Overall Length: 10.8 Inches (27.5 cm)