50-500 usd
The 1S prefix dates your browning sweet sixteen shotgun to the year 1961.
What_is_the_value_of_a_Browning_Sweet_Sixteen
This gun was made in 1961
made in 1961. Check the link below for values http://wiki.answers.com/Q/What_is_the_value_of_a_Browning_Sweet_Sixteen
The 1S prefix dates your Browning sweet sixteen shotgun to the year 1961.
The 1S prefix to your serial number indicates that your Browning Sweet sixteen shotgun was made by FN of Belguim for Browning in 1961.
Impossible to answer without a detailed description of all markings, features, box, papers, accessories, etc..
Proofhouse.com has sn data
Your Browning Sweet sixteen auto-5 shotgun was made Belgium for Browning in the year 1961 with the prefix of 1s to your serial number.
Only way to know is to call Browning and request a history letter.
Browning.com has sn data under customer service.
The serial number prefix 1S was assigned to the browning sweet sixteen model of the auto-5 shotgun in the year 1961,So yes you have a Browning sweet sixteen shotgun.