Back in the 80's I used to write for a small midwesten magazine called "The Outdoor Iowan". I wrote articles about hunting, dog training, and firearms. One of the articles I wrote was about a Simmons Quails Fargo I ran across at a gun shop in Mason City, IA. I couldn't find anything in my firearms library and the gun shop owner didn't know anything so I called Simmons. I had a very interesting interview with a gentleman who's name I can no longer remember. Now that I've set the stage and hopefully establish a little credibility I like to pass along what I learned.
There is a lot of background about how the arrangements were made but, I don't believe anyone in this forum is interested in that. The long and short of it is Simmons bought actions from Stevens and Dakin in the white. They did the stock work and the case hardening, built their own barrels, and attached their Simmons rib and a florescent bead. Unfortunately by the time I'd learned all about the Simmons and dashed back to purchase it someone else had beaten me to it.
I've visited Simmons several times over the last 30 plus years and have seen some outstanding two barrel sets they produced for their customers. In all cases they built the second set of barrels for the set in their shop. I haven't been back in 7 or 8 years so I don't know much about the shop now that it has changed hands. But, if you are fortunate enough to find or own one of these little gems you've got something very special.