Does any one have any info on this hand gun? It's a colt says police positive on the barrel which is about 3 inches long. On the frame between cylinder arm is stamped 5874. Also has a vp 3 on trigger guard area. It fires a 22 long riffle shell 6 shot revolver. Adjustable rear sights black hard plastic I think grips with colt logo. And the colt pony stamp on right side below the trigger. Gun looks good with little holster wear at barrel tip. But seems like the blue is intact. Any info on when where how and value would be nice. Thanks for your help ahead of time.