The Browning BDA is a sig Sauer P220 imported by Browning in the late 70's early 80's I believe, I could be wrong about the 70's. Anywho, they made them in a few different calibers 9mm and 45 being the more popular models. Eventually Sig themselves started formally importing them and the rest is history.
You be right!
I bought my Browing BDA (which is a SIG P220 with the mag release in the butt) new in 1978. Match grade accuracy and 100% reliability. Pretty much the same as my newer (2003) SIG P220.
Ksail - I had a SW 3906 that was a fantastic handgun. Andy Cannon did a remarkably slick action job on it as well as rounding off or "melting" the edges. Early magazines were 8 round but later on they made 9 round mags for it. For a single stack 9mm, it was pretty heavy but with that being said, it was so easy to fire. The slim grip was a really great fit to my hand. I sold it (and ten mags) to a friend last year. One gun I may try to buy back!