French Model 1853/1867 Snider Conversion, later modified to become a sporter for foraging/hunting (aka "ZULU" shotgun). These were generally French percussion muzzle-loading rifles 1840s, 1853s, and 1857s, converted to accept the Snider breech-loading system beginning 1867, allowing the acceptance of a cartridge (later a shot-shell usually in 10 or 12 gauge as in this example).
Barrel length is ~35" and stamped, "NANA"; overall length is ~52". Various French inspection stamps overall, various locations.
Stock has been altered to sporting length as with many French guns in the post-Franco-Prussian War years (post-1870/1871). One original barrel band, lower; no ramrod.

Another example with barrel length of ~34"; overall length is ~51". Various French inspection stamps overall, various locations.
Stock has been altered to sporting length; no original barrel bands, but acting as a lower band is heavy wire wrapped around the barrel and stock, ending in a unique swirled design; no ramrod.

This is one of the scarce brass breech-block conversions with some very interesting French history. Reportedly, these versions were produced during the Franco-Prussian War under siege conditions. The brass was obtained from French church bells, apparently donated to meet the materials shortage crisis. A neat tid-bit for the history buff.
Barrel length is ~34"; overall length is ~52". Various French inspection stamps overall, various locations.
Stock has been altered to sporting length; no barrel bands; no ramrod.

If you need further information concerning markings, etc., please make your request via the Identification service.