So I got my hands on a new heater. Or most of one. It's a French M1873 revolver. The DA trigger threw its hands up and fled the battlefield sometime in the last century and a half, leaving it single-action-only, and the Peacemaker-style ejector assembly is long gone, leaving you to poke spent cases our with a stick, but at forty bucks, the price was definitely right to add it to Miss Tam's Home For Derelict Firearms.
Now to find some 11x17mmR ammunition. (With a muzzle velocity of around 500fps, if you noticed that Pvt. Jaques was drawing a bead on you, you might be able to outrun the bullet with enough of a head start...)