:Gentleman,I have a Remington rolling block,on back strap it has may 3 1868 thur March,1874.Remington Arms,Ilion NY.BLL. has three straps with a U on each on. Back sight has #s 1,2,3,4 on it.There is a P on Bll.next to the receiver.Bore is not rusted out ,still has shine in places.There isn,t a...