You will need to include a serial number to have your question answered.
Browning.com has a sn function under customer service
Browning introduced the B78 rifle with an octagon barrel in 1972. This model was part of a series of single-shot rifles designed for precision shooting and hunting. The B78 gained popularity for its classic design and craftsmanship.
The Browning B78 rifle's date of manufacture can be determined using its serial number. For the B78 series, the first two digits of the serial number typically represent the year of production. In this case, with the serial number 70792W57, the "57" indicates that the rifle was manufactured in 1977.
1970
Browning's web site has a sn search function.
You will have to post the sn or call Browning.
Between 1973-75
Browning has sn data available on their webiste under Customer Service.
Your browning sweet sixteen shotgun dates to the year 1954 with the serial number that you provided.
You did not provide the serial number. You will need to call or visit the Browning web site.
your browning sweet sixteen was made in 1934.
W73 to 76 and then to current two letter code