Well, it is what it is and it isn't what it isn't. I've shared all the information I can give you. In my opinon it is not a Howdah pistol but a Belgian d.b. pistol (the poor man's revolver) with all the correct Belgian proof and inspector marks, made by one of the many anonymous gun makers (no makers mark on the gun) in the Liëge area at the end of the 19th or the beginning of the 20th century. Originally it was chambered in one of the popular pre W.W.I 11mm/.44 calibers of the time.
If you try shooting it, take pictures or make a video and share them with us please. Be careful and don't blow it up!