I am mainly interested in vintage firearms. I am not finding the indepth information i want in standard price lists. I took advice given on this board to someone else concerning the standard Catalog of Smith and Wesson, and I must say the same week it more than paid for itself. I bought a 1940's pre model 10 that turned out to be a low serial numbered 1905 hand ejector 4th variation in rare square butt and service sights that is worth far more than what it was originally portrayed. I am also a history buff and if I pick up a vintage revolver, I want to know more than the model and year manufactured. Keeping in mind that I allready have the smith line covered, I was wondering if there was a similar (bible) for colts. I picked up a 98% police positive at a gun show and was able to research the serial number to 1913, I can't help but think one this old would have a higher value than one made later in the '40s. My local gunshop owner allready thinks I am taking my hobby way to seriously. I guess I am looking for books that will give me more answers than value and model. Let me know what books would help me more specifically identify and value more accuratley.