If you have a Browning auto-5 shotgun in 16 gauge(you do not state)then it was made in the year 1928.
1928
35 years old
Browning's web site has a sn search function.
With the serial number that you have provided,your Browning Sweet Sixteen auto-5 shotgun was made in Belgium for Browning in the year 1957.
Your browning sweet sixteen was made by FN of belguim for browning in 1966.
With the serial number that you provided,you have a browning auto-5 standard weight shotgun that was made by FN of belguim for browning in 1955.
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.
With the 3S prefix to your serial number,I can say that your browning sweet sixteen was made in 1963.
Made in 1950.
Made in 1954.
I show no browning 16ga shotguns made with the prefix okg.to the serial number.Please check your serial number again and resubmit your question.
If its a 12ga it was made in 1926 If 16ga, it was made in 1929