I believe your serial number is wrong for a Sweet Sixteen.
your browning sweet sixteen was made in 1959.
Your browning sweet sixteen was made by browning in 1959.
Your Browning sweet sixteen auto-5 shotgun was made in the year 1956.
To answer your question I would need a serial number from your sweet sixteen.
Your browning sweet sixteen was made for browning in 1922 by FN of belguim.
Your browning sweet sixteen was made in 1958.
your browning sweet sixteen was made in 1955.
You have a Sweet Sixteen made in 1960.
Your browning sweet sixteen shotgun was made by FN for browning in 1928.
your browning sweet sixteen with a 2s prefix was made in 1962.
Your Sweet Sixteen was made in 1961. The 1 designates 1961, the S designates Sweet Sixteen. All auto 5"S were made in Belgium in 1961. 1961
Your browning sweet sixteen was made by FN of belguim for browning in 1966.