not sure if you are referring to an original 44 cal. Cap&Ball model 1860 revolver by colt ?? If original, made about 1864
the caltin model
50-350 usd
Depends on if it is a rifle or pistol
100 USD
Look on the butt for the sn
$200 and up, depending on condition,markings, and history of the gun.
the serial number is under the grips
50-150 USD or so
Please specify which marks you are talking about.
made about 1910 value depends on condition
1913
Requires professional appraisal.