Cartmell of Doncaster ball reservoir

Cartmell of Doncaster ball reservoir 

auction blurb:

Bonhams auction blurb:

With sighted barrel (probably shortened), border engraved octagonal breech engraved 'Doncaster' on the top flat, border engraved tang, signed flat bevelled lock with enclosed hooked cocking-lever, figured half-stock (minor splits and repairs, fore-end probably reduced) with pineapple chequered grip, steel mounts, steel spherical reservoir, and steel ramrod housed in a tube along the bottom of the barrel (some wear overall) 49.5 cm. barrel