Flint pistol - Nationality?

[Pukka Bundook]

Dear Corrado,

I do not mind being in error, as I always wish to learn.
After I posted my reply above, I noticed that your pistol was rifled all the way, and not merely made to take a key in the muzzle. Please see my edited post above.
It seems unusual to me, to not have a barrel that unscrews, as the stock being made short, is Usually made this way so the barrel Can unscrew.
I do not pretend to know more about your pistol than you do, but it Is most unusual!

Thank you for correcting me!

Very best wishes,
Richard.

Edited again to attach a photo of a little pistol I have, with stock very similar to yours, and the tab for unscrewing the barrel to load.
This is how I Presumed your pistol was meant to work. Thank you again for putting me right!