1983
No serial number = no way to answer.
serial #
1977
2006
1951
It was made in 1981.
15386
1928
The 2 letters in your serial number dates your shotgun to the year 2004.
No way of knowing without you providing the model number/name of the shotgun and the serial number that goes with it.
It depends on the serial number, one cannot get the date of manufacture with out the serial number
You must call Browning with the serial number to find out.