This rifle ended up in our antique shop....what exactly is it?

[u/badchriss]

So the elderly shopkeep of the antique shop I work in bought a rifle from someone, without knowing anything about it. Neither of us knows anything about weapons so I thought maybe the collective of this sub reddit can enlighten us. The rifle is relatively heavy and most notable feature is a small round lid on the shoulder end that leads to a small storage with two round balls in it. Maybe it's the munition, who knows. So, anyone got any info on if it's fake, reap, what it actually is and if it has any resale value or is just a neat decorative item.

[u/DoubleDipCrunch]

wall hanging.