Unusually Large Caliber (?) Percussion Target / Dueling Pistols c1860

[Pukka Bundook]

Very nice to see, Corrado.

I did see one sell recently very like this, with the groove down the top of the barrel, by W'm Truelock.
It too was very large calibre and would certainly be a man-stopper!
The French cock on yours says about 1810, though the pan style looks a bit earlier.

Thanks for sharing.

Richard.