Oskar a page or so back said "There is always the Bretton but I think they had an alloy frame."

I have one of the "Deluxe Baby Brettons" - 20 gauge, that is so light I suspect very few people can shoot it well. Roger Barlow wrote about the Brettons in a couple of the early Gun Digest books. Since I was so taken with his Barlow Simca Special sports cars, I had to have one of the shotguns he loved. Now, having it in hand, I suspect his infatuation had something to do with his suffering with ALS, thus the light weight was a requirement for him.