$350-$850
YOu must provide the serial number.
It shouldn't say light twelve on the barrel, but on the receiver. Light twelve means that the gun is a light weight version of the standard Auto5 shotgun.
No serial number provided
If your browning auto-5 is in excellent condition(85-90%)original finish?I would assign a value of 550-650 dollars.
1938, Belgium
By this serial number for an Auto5, the gun should be a Light Twelve 12 guage model made in 1956. It is not a Sweet 16.
Impossible to answer without a serial number.
it was made in 1961
You need the services of a gunsmith
Go to Browning.com and you can download a manual
You will have to call Browning
Try e-gunparts.com, Mid West Gun Works, Browning.