Hello Jane , you gun dates to 1931 , made by Kenton . My book shows it valued at $125.00 to $150.00 in mint condition . Of course that is an estimated value , not gospel .
Sounds like a great time. The lamb is cool. Keep the gun or if you do decide to sell, dont clean it. Most collectors want their items as found, but you already know that. I'd leave it just as it is, looks great for being in a wall for many, many years.
I need to get down your way and see all the goodies you tease us with from time to time.
From the age of the farm house we should be finding bottles but nothing yet. The bulldozer comes soon to knock down the house/barn and bury everything. Maybe we'll find bottles when they dig the big hole.