Here is a list of other sites that can be valuable resources for your research.
Colt.com - This is Colt's official site.
Colt Archive Properties - This is where you can order a Factory letter about your Colt Pistol. The factor letter will often show a shipping date and shipping destination.
Colt Firearm Serial Number Lookup- Colt offer's a free service where if you enter the Serial Number of your Colt they will respond with a Year of Manufacture of your pistol.
Colt Collectors Association - This is the primary colt collectors club. They will have a show once a year at various locations around the U.S.
Colt Forum - Online forum to discuss anything Colt related.
American Society of Arms Collectors - Group of persons interested in collections, research and study of arms, armor, accessories and accouterments.
Bob Rayburn's Woodsman Page - Great source for highly detailed information about the Colt Woodsman and the multiple variations of this pistol.
Cool Gun Site - Good site for information about the M1911, M1911A1 and parts. Helps identify a good amount of the individual parts and Serial Number ranges they are used in.
Fine Old Guns - A website that sells Antique and Collectible Firearms and Militaria Items. Also has some great serial number lookups and inspector marking information.
Forgotten Weapons - Forgotten Weapons is a popular website and YouTube channel that covers the history of antique, obscure and historically important firearms.
Sam Lisker's Colt Autos - A great resource for Colt Automatic pistols and information.
Safe Queens - The premier online auction marketplace for those looking for quality collectible firearms and antiques.