I've got a 'Bianchi Firearms Record Book' that a friend gave me over 20 years ago that have all my guns in it. It's pretty thorough, has spaces for make, model, ser. #, value, caliber, barrel length, special features, date acquired, date sold and disposition, I quit putting any kind of value for a firearm in the book, I had $480 for my Colt Anaconda and $600 For my Colt Python back when I bought them and both of those guns are worth over $1K each now!