That is indeed a zimmerschutzen rifle as hrf said.
Most likely it was a cheaper model since it's a no-name maker, but it is fitted with a pretty decent tang sight.
Indoor target matches with these rifles was a common beerhall event, much like throwing darts or shooting pool is. It dates back into at least the early 1800s in the southern and western German states (the kingdoms and duchys of the Confederation or empire).
Many places had a rack of rifles for patrons to chose from, but just like pool cues, the more avid shooters had their own personalized ones too.
This passtime is what brought about all those cheap little Flobert style parlor rifles that showed up in the 19th century.
Here is a link to a rifle similar to yours. Not mine, just posting it for comparison.
If you google search around, you will find some very ornate ones as well that were undoubtedly personal rifles.
Oh...and please don't refer to it as a Zimmerstutzen. That would be a wooden ceiling beam. (stutzen = a support or brace).
There are enough gunwriters out there that can't get it right, and it drives (at least this) german speaking person nuts.
A Zimmerschutzen is an indoor rifle, or literally a room shooter.