I recently aquired this Colt revolver. I believe it to be a Police Positive 38SP, but the rest is a mistery. It would appear the the revolver has an one time been chrome plated. There are no markings on the barrel, the markings on the butt or rather strange. What I am able to see, is the No. (one in about the middle and the other towards the bottom) and a a couple of numbers (11) but there is a proofmark in the shape of an anchor above the No. mark. Its a nicely done hallmark but I have no idea what it means. I tried to take a pic but it didn't turn out, I'll keep trying but here are a couple of shots of the revolver. Thanks for your help! Is there any other place that I should look for a SN?