Natural Dad - Sorry to read of your loss. My "Blue Book of Gun Values" is 10 years out of date, so I can't be much help to you there. If you have detailed photographs of the gun, such as are sometimes posted here and often used elsewhere to sell a gun, it would be possible to have an appraiser give a professional opinion for insurance (or crying) purposes. Makes me think I'll be getting out the camera shortly, just in case. Thanks for the warning. All the best. Shoot Safe, SidelockSxS