I have an old Colt single action army that the serial numbers are not all matching im pretty sure the grips are original. im pretty sure it is a 44-40 the cylinder bottle necks inside, the front sight is short and looks to be brass. timing is good cylinder locks up but if its twisted it will turn about 1/10th of a turn. i am pretty sure this is from lots of years of use. the pistol looks like it was originally nickel plated but most is wore off now. also cylinder pin is not the origional. barrel is 4 3/4". any info/ value is greatly appreciated not looking to sell just trying to learn more about this gun.