They refer to this handgun as the browning model BDA (browning double action auto) pistol.
what is the question?
Yes
The browning web site will provide this info.
How value is Browning 300 Win Mag Semi Automatic
Basically impossible to value with your description.
Twelvette, Double Automatic, Auto 5. Twelvett, Double Automatic, Auto 5.
100-600 USD
Your browning auto-5 shotgun which was made in 1970 is valued at between 375-550 dollars.
Look and see if your Browning double auto has a number ahead of the letter A or 2 numbers ahead of the letter A.This is needed to establish the year of production.No Browning double auto could be ordered with a Polychoke,this would have been a after market installation.
Impossible to answer without a detalied description of all features, markings and the serial number.
1968