With the 3S prefix to your serial number,I can say that your browning sweet sixteen was made in 1963.
Your browning sweet sixteen was made by FN of belguim for browning in 1966.
your browning sweet-sixteen with the serial number you provided was made by browning in belgium by FN in 1956.
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.
You will need to call Browning.
You did not provide a serial number. You will have to call Browning.
With the serial number that you have supplied,your Browning Sweet Sixteen model auto-5 shotgun was made in Belgium for Browning in the year 1953.
No serial number given.
With the serial number that you have supplied,your Browning Sweet sixteen was made in Belgium for Browning in the year 1956.
1927
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.
1969
You will have to call Browning.