The second gun I ever owned, and the first I ever purchased for myself was one of those Sears/Stevens doubles, but mine was a 12 ga with 30" mod/full barrels with 2 3/4" chambers.
I was too young to order it myself, so my mother made the call to Sears and put in the order. The gun, a couple of boxes of shells, and a brown canvas hunting coat. This of course was in those "pre-68" days when you could just call Sears and buy a gun. IIRC, the gun was $79.95.
I had saved the money out of my pay for working on a local farm, for $5.00 a day. Big money for a teenager in those days and that very rural area.
The Sears truck came by the house after 3-5 of the longest days I had ever experienced in my life, later and dropped it off.
Man that thing was heavy and those long barrels made it muzzle heavy. It was OK for squirrel and deer hunting, but I don't think it would have been much for birds. I sold it off years later when I got a pump gun.
I would have liked to have one of those 20's though.