Hello, I have this beautiful .44 Magnum revolver, with 8" barrel. The Serial Number is N424xxx and it is a model 29-2. Can anyone help me with year it was made and value? I do not have original box. My Dad passed away years ago and left a few pieces like this one. My brother wants to buy from my Mom but we want to be fair and make sure Mom gets what it's worth. Thank you for any support.