Go to Browning's website under Support then go to Date your firearm. Value of any used firearm depends upon condition and area of sale.
1967
It will be marked if it is Belgian made.
This gun was made in 1961.
1970
This is a Belgian Browning Lightweight 12 Ga. made in 1965
your browning 16ga auto-5 shotgun was made in 1949.
It was made in 1930
This gun was made in 1953
your standard weight browning auto-5 was made in 1964.
1971
50-600 usd
Your browning auto-5 12ga lightweight shotgun was made by FN for browning in 1967.