Shotgun from Movie version of Little House on the Prairie

Ok, maybe it's not 410 but .45? Like the Taurus Judge.
Now it makes more sense, since like modern combo barrels, he has his short/long(er) range choices for hunting whateve looks tasty.

EDIT -
Ok found a real beauty here;
http://www.gunsamerica.com/992457815..._9_3_X_72.htm#

[Nyles]

Wow. I've never seen a SxS combo gun before, that's actually pretty cool.