2 old colt revolvers?

[napg19]

My buddy has 2 old colt revolvers and wonders when they were made. they both have plastic grips and are single action. one is a 38WCF s/n 311004 and the other looks like a bisley design, 45 colt, s/n 252656. Any help is appreciated, Thanks, Richard. Also a guesstimate of the value of them. Both have petina inside barrell and out side of gun but actions work and are smooth and lock up tight.

 

[Dfariswheel]

We need more info. Colt made a number of revolvers in those calibers.

Photos, or at least the model name stamped on the barrel of the double action would help.
The Bisley design is either a Bisley single action or it isn't.