Kc

What you have there is a Howdah Pistol
Howdah Pistols are compact, big caliber pistols designed around rifle actions, which were intended as primary backup for hunters who rode on the backs of elephant.
The elephant would be outfitted with a special, great big saddle called a Howdah. The hunters from time to time would get attacked by tigers, jumping aboard the elephant to attack the men.
The Howdah Pistol packed two quick hits of seriously hard hitting defense against such an attack.

The pistol shown above appears to have been refinished -- not necessarily a bad thing -- not necessarily a good thing either.

Better photos would very much be appreciated.
Can we see the top rib, the barrel and action flats, the lockplates, the trigger guard, and a shot down the bores please?

These things are awfully cool, we like them, and we want to see as much of this pistol you're showing here as we can.

Here's an old percussion howdah I used to own.

--Tinker