I have a percussion pistol that i would like info on. The bore measures out to .62 cal. It has a 5.10" smooth bore barrel. O.A.L. of pistol is 9.5". Markings on left side of barrel are: (c)(a) (c). On the lock plate are the words: Mre Nle de Tulle.bottom of trigger guard has a capital M. Any ideas guys? :hmm: