This gun was made in 1954
Contact Browning.
You can access the date of manufacture of many Browning firearms at the Browning website, under Customer Service.
Your browning sweet sixteen was made by FN for browning in 1951.
1951
1924
1924
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.
Your serial number indicates that your sweet sixteen model Browning shotgun was made in the year 1954.
You will have to call Browning.