Sorry to say, this is not a Sweet 16. A Sweet 16 is a lightweight 16ga made in Belgium and later in Japan. Not all Auto 5 sixteens were lightweight. Many were the standard weight model. What you have is called an American Browning. These guns were manufactured by Remington in the US (New York) for Browning after Belgium was overun by the Germans in WWII. The guns were made using Remingtons model 11 equipment. A few modifications were made to incorporate more of the Browning features and were all stamped Browning Arms Co. St. Louis mo. Your 16ga gun sn: A5321 was made and shipped to Browning in 1940. It has the first style engraving pattern, and was one of the first of the American guns made in 16ga. All American made models started at serial number 5000, so you're gun is the 321st gun made by Remington. Congrats on a low serial number.
Your browning sweet sixteen was made by FN of belguim for browning in 1957,with the serial numbe that you provided.
your browning sweet-sixteen with the serial number you provided was made by browning in belgium by FN in 1956.
That is not a Sweet Sixteen serial number.
Your browning sweet sixteen was made by browning in 1953.
your browning sweet sixteen was made in 1955.
your browning sweet sixteen was made in 1959.
Your browning sweet sixteen was made by browning in 1953.
With the serial number that you provided,your browning sweet sixteen shotgun was made by FN of belguim for browning in 1928.
Your Browning sweet sixteen was made in the year 1955 with the serial number that you have provided.
Your browning sweet sixteen shotgun was made by FN of belguim for browning in 1961.
your browning sweet sixteen with a 2s prefix was made in 1962.
Serial number s76529.The serial number S76529 indicates that your Browning sweet sixteen shotgun was made in the year 1957.