A .577/450 Westley Richards martini action sporting rifle

A .577/450 Westley Richards martini action sporting rifle, barrel 25 in., 'Cape' back sight comprising one standing and two folding leaf sighs marked for 100/200/300 yards and a tangent sight marked from 400 to 1,000 yards, barrel marked 'FOR W.R. MARTINI CARTRIDGE', action with triangle trademark and 'WESTLEY RICHARDS & CO LONDON', pistol grip stock with later chequering. Obsolete calibre, no licence required in the UK.