Serial # is 9256XXX. I realize it was in the VA police dept it's total everyday living and I believe it had been created close to seventy four-seventy five timeframe. No additional engraving or markings from dept, selector marked Secure-semi-automobile. Hope that can help the database Tony. When you stumble https://juliuspssqn.suomiblog.com/not-known-facts-about-colt-combat-unit-rail-gun-45-46934490