Welcome to the Forum.. You need to order a factory historical letter on this gun. It will tell you when it was shipped, where and to whom & the configuration of the set, etc. You may have a very valuable Model 41 that was a special order, etc. The application for the letter is on a link on this Forum, or call S&W's customer service. Cost is $75 but it could ad $100s to the value. Move this to the auto pistol category. Ed.