The 3S prefix to your serial number indicates that your Browning sweet sixteen shotgun was made by FN of Belguim for Browning in 1963.
Your browning sweet sixteen was made by FN of belguim for browning in 1924.
Your browning sweet sixteen was made by FN for browning in 1951.
Your browning sweet-sixteen was one of the last six shotguns made by FN of belguim for browning in 1949.
Your Browning sweet sixteen model auto-5 shotgun was made in the year 1956.
The prefix of 9S indicates that your Browning sweet sixteen auto-5 shotgun was made in the year 1959.
Your serial number indicates that your sweet sixteen model Browning shotgun was made in the year 1954.
With the serial number that you have provided,your Browning sweet sixteen auto-5 shotgun was made in the year 1956 by FN of Belgium for Browning.
1924
1951
Your Sweet 16 should be a 1949 gun.
The 0s prefix to your serial number sets the date of manufacture of your Browning sweet sixteen shotgun to the year 1960.
This firearm was made in 1956