If you own the browning light 12 with a plain barrel then 340-450 dollars based on the shotgun having between 60%-90% of its original finish remaining.If you have the vent rib barrel then 415-630 dollars.
50-350 usd
Your browning auto-5 light weight was made by FN of belguim for browning in 1960.
The 5G prefix to the serial number indicates that your browning was made by FN of Belguim for browning in 1965.
1943 browning light 12 belguim made $5K
Best to ask a gunsmith for help.
Your browning light weight auto-5 shotgun was made by FN of belguim for browning in 1972.
Your serial number indicates that your Browning light twelve was made in the year 1955.
Good shotgun
your browning auto-5 light twelve gauge was made in 1960.
Your browning auto-5 light weight 12ga shotgun was made by FN of belguim for browning in 1954.
Readily available from Browning.
Google "stock makers".