Browning.com has a sn look up function listed under customer service.
This is a 16ga Auto 5 made in 1953.
your browning auto-5 shotgun was made in 1947.
This is a Standard Weight 16ga Auto-5 shotgun. It was made in 1956.
If you have a Browning auto-5 shotgun in 12 gauge then it was made in 1927.If you have one in 16 gauge then it was made in the year 1931.
your browning 16ga auto-5 shotgun was made in 1949.
Your Browning auto-5 16 gauge shotgun was made in the year 1931.
With the serial number that you provided,your Browning auto-5 shotgun was made in the year 1946.
The 4V prefix to your serial number indicates that you have a Browning auto-5 Magnum shotgun made by FN of belguim,in the year 1964.
Your browning auto-5 12ga lightweight shotgun was made by FN for browning in 1967.
Browning never made a model 400 semi-auto shotgun.I believe that your shotgun might have been made using 1 of john brownings Patents,which would require that the patent be posted on your shotgun.
That is an Auto-5 'Magnum Twenty' made in 1969. In excellent condition, they can reach $1400.
The barrel will be marked "Made in Belgium"