Smoothbore Pauly Sporting gun
Manufactured by Jean Samuel Pauly in Paris, France c.1812.
Pauly was a Swiss gunsmith based in Paris, in which he designed with the French Prélat the first self-contained cartridge, patenting the designs in 1808 and 1812. This allowed Pauly to manufacture easy to reload breech-loading firearms with the possibility to stockpile ready ammunition for them. These innovations would go unused for two dozens years except for these examples of hunting muskets, despite being the basis for all modern firearms.
Note the external cocking lever reminiscent of earlier firelocks.
a Pauly gun’s open breech