No way to answer without a detailed description to include action type.
If your browning 16ga shotgun is a auto-5 then it was made by FN of belguim for browning in 1927.
Your sweet sixteen browning auto-5 shotgun was made by FN for browning in 1963.
Possible, but, not recommended.
The prefix of 2S indicates that you have a Browning Sweet Sixteen auto-5 shotgun that was made in Belgium for Browning in the year 1962.
Made in 1954.
If its a 12ga it was made in 1926 If 16ga, it was made in 1929
Your browning model auto-5 shotgun in 16ga.was made by FN of belguim for browning in 1951.That makes your shotgun 60 years old.
If we are talking about a Browning auto-5 shotgun in 16 gauge?Then the serial number that you provided indicates that your shotgun was made in the year 1950.
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.
If you have a Browning auto-5 shotgun in 16 gauge(you do not state)then it was made in the year 1928.
With the serial number that you have provided,your Browning Sweet Sixteen auto-5 shotgun was made in Belgium for Browning in the year 1957.
To answer the question, you need to provide a detailed description of the shotgun to include action type, gauge and all markings.