Serial # Is 9256XXX. I realize it was in a VA police dept It can be complete everyday living and I believe it had been produced around seventy four-seventy five timeframe. No added engraving or markings from dept, selector marked Secure-semi-car. Hope that assists the database Tony. If you stumble https://juliuspssqn.suomiblog.com/not-known-facts-about-colt-combat-unit-rail-gun-45-46934490