No way to answer without a sn, condition and bbl length.
Contact Browning.
You can access the date of manufacture of many Browning firearms at the Browning website, under Customer Service.
1959
Your browning sweet sixteen was made by FN for browning in 1951.
1924
1924
1951
This gun was made in 1954
Your browning sweet-sixteen was one of the last six shotguns made by FN of belguim for browning in 1949.
Browning's web site has a sn search function.
Your Browning sweet sixteen model auto-5 shotgun was made in the year 1956.
This was made in 1958.