Need a detailed description of finish, condition, box, papers, all features and markings.
By the serial number.
No such thing as a 22 Shotgun.
To determine the exact value of a Browning automatic 20 gauge shotgun made in Belgium, a couple factors would need to be taken into consideration. Some of these things are the age and condition of the shotgun.
Need the model to determine age.If you have a Browning auto-5 shotgun,then with the serial number that you supplied your shotgun was made by FN of Belguim for Browning in the year 1924.
Japan, Portugal and Belgium
No such model number.
Your question cannot be answered,without you providing a serial number(to determine the age)of your shotgun.
Your browning auto-5 shotgun was made by FN of belguim for browning in 1957.
Your Browning auto-5 shotgun with the prefix of 70s to the serial number identifies that your shotgun was made in Belgium for Browning in the year 1970.
Your sweet sixteen browning auto-5 shotgun was made by FN for browning in 1963.
If your browning 16ga shotgun is a auto-5 then it was made by FN of belguim for browning in 1927.
This is best left to a gunsmith.