This should be an Auto5 12ga Magnum. We can tell this by the letter "V" in the serial number. However, there has to be a number before the V, which doesent show in your serial number. Are you sure the V is stamped the same way the 640970 is stamped? Could this be a 6V40970? In any case the number is incorrect. Please re-check and ask the question again. Thank you
0-500 uSD
81 junior
1973
1950
YOu must call Browning.
1950.
1931
1966
6V = 1966
Call beowning
1971
go to Browning.com, select customer service, select date your firearm.