The Browning light weight 12 gauge shotgun was made by FN for browning from 1947-1976.These shotguns were also made by Miroku of Japan from 1976-1998.If you would supply a serial number to your browning shotgun then I would be able to identify the exact year of production.
Your serial number indicates that your Browning light twelve was made in the year 1955.
your browning auto-5 light twelve gauge was made in 1960.
1954
You will have to call Browning with the serial number.
1958
Call Browning.
1979
This gun was made in 1953
Your browning light twelve was made in 1972 as the number prefix suggests.
@ 33 years old
1962. sales@countrygunsmith.net
This gun was made in 1963. It is a "Light Twelve" model