Hmmmm---A little more info? Bore diameter? Smoothbore or rifled?
NO marks at all--not even some weird little ones on the bottom of the barrel?
Any marks under the grips?
I'm not buying 1730 to 1750. Really can't be. That's the era of the flintlock,
and this little cutie sure isn't a flinter. Maybe 1830 to 1850, which would put
it solidly in the percussion caps heyday.
I really can't tell WHAT this thing is supposed to be. If it's percussion,
it's missing the nipple and that's a HEAVY hammer for a little gun.
I'm almost leaning toward a Flobert parlor gun of some sort. Flobert came
out with the .22 cal BB cap in the 1840's--and I have seen guns that relied
on a heavy hammer to retain the cartridge as it fired. If the barrel is bored through and diameter is .22 on up to 6mm, my GUESS is Flobert style
parlor gun of some sort.