1972-1987
12 gauge BSS were first made in 1971 and 20 gauge in 1972.
Made before 1975
It was made in 1981.
Any BSS is rare as only about 1,200 or so were made. Made from 71-87. Gold triggers started in 1978
Made in 1972
That is the number of a Japanese contract-made Browning BSS. Current online prices are in the $900-$1500 range in as new condition, less used. (May 2012)
To determine the manufacturing year of your Browning BSS 12 gauge shotgun (serial number 6481A57), you can refer to the serial number dating guide for Browning firearms. Generally, Browning BSS shotguns were produced between 1977 and 1989. For the specific year, you may need to consult Browning's records or a firearms expert, as exact dating can depend on the serial number prefix and suffix.
BSS was made from 1971-1987
If you have the money....
1972
1986
You must call Browning with the serial number to find out.