Need a detailed description
It will be marked on the barrel.
Your browning auto-5 standard 16gauge shotgun was made by FN of belguim for browning in 1953.
solder
Your browning 16ga was produced by browning in belguim in 1949.
If it is a Browning Superposed 12 gauge it was made in 1959.
Where will be marked on the barrel/receiver.
Best left to a gunsmith.
Should be marked on the barrel
Check the receiver and barrel
You must call Browning to find out.
Should be marked on the barrel