5/1/20 - This is a scarce Colt Police Positive revolver rig that was sent to the Railway Express Agency, as indicated by marking on back of frame and the front flap of the holster. It's all original with 90+% blue remaining, with most of the finish loss on the muzzle and the cylinder. Excellent grips and bore. Four inch barrel. Smooth timing/action. Serial dates the gun to about 1930. The holster is in very good shape with clear 'RAILWAY EXPRESS AGENCY' marking.