No way to tell model from jus the serial number.
On a Colt revolver, the serial number is generally in two places. When you open the cylinder you will find the serial number at the base of the frame & crane.
The butt.
Typically, right side of the frame, below the cylinder.
serial # could be on side of frame near cylinder or bottom of butt..........
Open the cylinder, it should be located near hinge.
That Colt police positive special with serial # 594826was manufactured in 1951.
1877 if it's a Single Action Army. Nothing special about the serial number.
100-450 USD or so
about 1919
50-200
No published sn data
there are far to many #s to be a proper serial #