NAFAIK.
No.None of the browning auto-5 shotguns left the factory with a adjustable choke.This was a after market add-on.
It made them for more than one year since the 30s
No.Savage made these shotguns,but paid patent rights to Browning for the use of John M Brownings design for there shotgun.
Both the sweet sixteen model and the regular production semi auto shotguns were Browning auto-5 shotgun models.The regular Browning auto-5 shotgun had engraving on the receivers just like the sweet-sixteen.
They will do special orders.
There were 2 distinct models of the Browning double auto shotguns made.the first models were the standard double auto,and light weight double auto shotguns which were made from 1952-1960.The second set were the twelvette double auto,and the twenty weight double auto.These were made from 1957-1971.The letter combination prefix of 3A would suggest that your Browning shotgun nwas made in the year 1963,which would make it the second set of shotguns mentioned.I hope that you find this info informative.
Not published in any reference.
They made identical shotguns in other gauges, but if it is not a 16 gauge, it is an Auto-5, not a Sweet Sixteen.
No.
He was an inventor.
Yes, they were the mfg plant that first made Brownings in Japan in 1976.
There is no such weapon made by Browning. Browning does make a semi-auto of the BAR in 30-06. You can download or request a manual from the Browning web site.