1952
No
1999
Your browning model auto-5 magnum 12ga shotgun was made by FN for browning in 1965.
Auto-5 Lightweight 12ga made in 1960.
If you have a Browning auto-5 shotgun in 12ga,then it was made in the year 1925.If you have a 16ga shotgun then it was made in 1929.
Assuming it is an Auto-5 12ga, 1950. sales@countrygunsmith.net
They were first made and imported into the U.S. by Browning in the year 1903.The last year for Belgium made shotguns was 1975.
Should be a 12ga made in 1951.
You will need to call Browning.
Your browning auto-5 12ga lightweight shotgun was made by FN for browning in 1967.
Browning's web site has a sn search function.