Any pictures that he might be able to provide would be worth more than a thousand words. Can't do much without pictures. The numbers are a bit confusing as well. The Colt M-1911 is just that, they started using it in 1911 after finding that the old .38 cal revolver was useless against the Moro Indians in the Phillipine Islands. Any information you can get as to where those numbers are located and on what pieces the numbers are stamped would be a great help in identifying it.
Early Colts that pre-date WWI are near priceless antiques (for lack of a better word), especially if they are in decent condition. Next time I head for TN, I can bring along one of its newer 'cousins'. It may not be a Colt, but it's definitely an M1911, and of WWII vintage.