In order to give you a accurate value please include the serial number to date your sweet sixteen shotgun along with the overall condition,and what type of barrel that your shotgun has (plain barrel,solid matte rib.or vent rib barrel).
Your browning sweet sixteen was made by FN of belguim for browning in 1951.
Your browning sweet sixteen auto-5 shotgun was made by FN of belguim for browning in 1957.
Your browning auto-5 sweet sixteen was made by FN of belguim for browning in 1951.
Made in 1959 http://wiki.answers.com/Q/What_is_the_value_of_a_Browning_Sweet_Sixteen
The serial number prefix of 0S indicates that your Browning sweet sixteen shotgun was made by FN of Belguim for Browning in the year 1960.All Browning shotguns made prior to the 1976 were Belguim made shotguns.So to answer your question,yes you have a Belguim Browning.
Your browning sweet sixteen auto-5 shotgun was made by FN of belguim for browning in 1967.
With the serial number you provided,your browning sweet sixteen was made by FN of belguim for browning in 1955.
Your browning sweet sixteen shotgun was made by FN in belguim for browning in 1960.
Your browning 16ga shotgun was made by FN of belguim for browning in 1938.
Your browning auto-5 was made by FN of belguim for browning in 1958.
Your browning sweet sixteen auto-5 shotgun was made by F N of belguim for browning in 1957.
Your browning sweet sixteen auto-5 shotgun was made by FN of belguim for browning in 1947 with the serial number that you provided.