Flint pistol - Nationality?

[JamesKelly]

Oh my was I wrong. And glad to be so
Yes, the rifling is real, extending all the way to the breech as it should. 7 grooves, flat lands.
One minor point is the numeral eleven neatly cut into the stock.

In the USA we are intensely interested in mid-18th to early 19th century American made rifles. We call them "Kentucky rifles", possiblly bsed on an old song celebrating how our last spat with the UK turned out. Most were made in Pennsylvania. Since 1928 there have been countless books on the subject.
My point is, over here I can look at an 18th cnetury American rifle and by the style alone have a good idea where an unmarked rifle made, the state and even the county. Are there detailed books written on German flintlock pistols? I have one on Jaeger rifles written a few years ago, with English translation. Although - Ich habe nur paar worten Deutsch - I am willing to struggle through German text where flintlocks are concerned.

I thank you all for your comments. And I am happy to have a real rifled pistol. Our American "Kentucky" rifles were made by German gunsmiths in Pennsylvania, based on Germanic styling with a longer barrel. So this is the nearest I can afford to an American pistol, usually rifled.