You did not give the sn. Call Browning.
I thought twentyweight was for (20) gauge.. I assume you are talking about Browning shotguns? The "Double Automatic" was a Browning A5 type of gun that only held two shells. Lighter weight than a standard 12 gauge,maybe as light as a 20 gauge gun. The aluminum receiver would be the main way the weight was reduced on the 12 gauge. I'm sorry I don't have my Browning books handy to give any more info.
50-350 usd
What is the question?
Impossible to answer without a detalied description of all features, markings and the serial number.
You will need to check 1956 gun catalogs with Browning in them.
Twelvette, Double Automatic, Auto 5. Twelvett, Double Automatic, Auto 5.
browning 2725
200 usd
Yes
50-300 usd
The Browning Double Auto was designed by the late Val Browning, son of John M. Browning. It was made in 12 gauge only between 1952 and 1971 in Belgium by Fabrique Nationale. There were three variations: Standard, Twelvette and Twentyweight. Barrel lengths were 26, 26 1/2 (Twentyweight only) 28 or 30. Could be had with or without a vent rib. Value depending on condition 400-900. Rare colors will bring more. @ 65,000 were made The alloy frame was available in different colors (royal or light blue, satin gray, green, gold, black and brown. I have also heard of pink and red, but have not seen). For parts try Numrich Gun Parts Corp., (www.e-gunparts.com); 1 866/686-7424).