First, the value of a guns is based on exact make, model and condition. We can't see yours, so we cannot judge condition. Take it to a gun shop or a gun show for a hands-on appraisal. As far as the year of manufacture- no Browning Sweet 16 used an S prefix to the serial number. Either your gun is not a Sweet 16 (will say Sweet 16 on the left side of the receiver) or that is not an S. Contact Browning customer service through their website for a definitive answer.
With the serial number you provided,your browning sweet sixteen was made by FN of belguim for browning in 1955.
With the serial number that you have supplied,your Browning Sweet sixteen was made in Belgium for Browning in the year 1956.
Your browning sweet sixteen was made by FN for browning in 1926 with the serial number you provided.
Your Browning sweet sixteen was made in the year 1955 with the serial number that you have provided.
Serial number s76529.The serial number S76529 indicates that your Browning sweet sixteen shotgun was made in the year 1957.
Your Browning sweet sixteen was made by FN of belguim for Browning in the year 1955 with the serial number that you provided.
With the serial number that you provided,your Browning sweet sixteen shotgun was made for Browning in the year 1953.
your browning sweet-sixteen with the serial number you provided was made by browning in belgium by FN in 1956.
Your browning sweet sixteen was made by browning in 1949.
Your browning sweet sixteen was made by browning in 1964.
with the serial number that you provided,your Browning sweet-sixteen shotgun was made in 1932.
The 1S prefix to your serial number indicates that your Browning Sweet sixteen shotgun was made by FN of Belguim for Browning in 1961.