I have in front of me a Colt 'Police Positive Special' revolver. The grips are hard black rubber with a thumb rest on the left grip. The fixed sights are a thick blade and squared notch. The ejector rod is unshrouded. On the back of the grip frame are the initials "RHKP" which I think stand for Royal Hong Kong Police. There is slight holster wear. My camera is not playing nice, so I can't include a picture. Can anyone tell me anything about this gun?? Wanna kill these ads? We can help!