These may be of interest

4 cartridge pistols
The only real Howdah is 3rd down, a .577 Snider by Wilkinson
The bottom is a .500

The bottom one here is what you get by "bodging" a shotgun
it is a 16 bore pinfire, I knew what it was and it was very cheap!!
I have seen one for sale in the UK somee years ago that the deealer swore was real!

the other is a Belgian rifled 16 bore pinfire, long heavy barrel, AFAIK not modified
Also cheap so I had to have it

My opinions on real Howdah pistols is known to some of you but whatever they are they are definitely interesting an historical part of the gunmaker's art

Please post pics of anything you make up or modify and good luck trying

TH