About 15 years ago I inherited a very nice Win Mod 12, 12 ga. I would like to know the age etc and about how much it is worth. Could someone please let me know how to determine its age and approx worth? My aunt told me that she thought the gun was purchased around 1930 new by her grandfather. Thanks for any help you may give me. The ser # on the barrrel and reciever match and they have only 6 digits.