Speaking of line guns, how many of these can you identify? I don't have info on the last one in this slideshow. The tube looks like a Bronze Gun "C" but it is larger and cast iron. Trunnion mark with date is I'm sure phony, forget it. The muzzle mark "111" is real. Use password "attack" for slideshow.
I've never seen an iron model before, but it certainly bears a striking resemblance to the bronze gun.