Made for Sears Roebuck by Stevens. There may be a model number on the right side of the receiver (most likely 5000, 5100, or 311) or a Sears product number on the barrel (101.6?) which could give an approximate date.
Sold by Sears Roebuck. Probably manufactured by Stevens.
If it is side-by-side, probably Stevens.
Hammerless
50-100 USD or so
Try gunstocksinc.com
It is only worth what the person buys it for...
From what I could find your gun is made by Winchester. It should say it on your gun somewhere though.
Yes.
I have a Spencer hammerles shotgun, and it has America 's new hammerless on the barrel
The Sears Ranger 105-20 16 gauge shotgun came out in the 1930s. The Sears Ranger shotgun has a 26-inch barrel.
70-100 years
1910, give or take a few years.