Are you sure it is a Sweet 16? please check the following link http://wiki.answers.com/Q/What_is_the_value_of_a_Browning_Sweet_Sixteen
What_is_the_value_of_a_Browning_Sweet_Sixteen
what is the value of a browning sweet 16 no. 51003
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Browning sweet 16 model s76727 value
Sweet Sixteen
A5
Value of Browning Sweet Sixteen serial # 74366
your browning model auto-5 shotgun sweet sixteen was made by FN of belguim for browning in 1967.
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.
Your browning model auto-5 shotgun was made by FN for browning in 1949.
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.
Your Browning sweet sixteen model auto-5 shotgun was made in the year 1956.