The most consistent answer to this question that I have seen is: Shotguns labeled 'Ranger, Patent April 20, 1915, Proof Tested 12 Gauge' were made by Savage/Stevens Firearms and marketed through Montgomery Ward. However, the design may have begin with Springfield
Sold by Sears Roebuck. Probably manufactured by Stevens.
If it is side-by-side, probably Stevens.
Yes.
From what I could find your gun is made by Winchester. It should say it on your gun somewhere though.
50-150 USD
50-150 USD or so
No
"Your" Winchester Model 21 Double Barrel Shotgun was manufactured in 1933, giving it an age of 77 years, as of 2010.
1966 to 1988
Hunter Arms Company, Fulton, New York
The Ranger 410 double barrel was made for Sears Roebuck by Hunter Arms and by Steven Arms. Yours was Made by Stevens Arms.
Most likely Stevens they did make a model #5100