It is a Stevens Model 311.
Dates are found behind the hinge pin, ahead of the trigger. Remove the barrel to see. It will be a circle with a letter in it. A is 1949 and each letter adds another year. B-1950, etc.. there is no "0" or "Q". X is 1970.
It is a Stevens Model 250A, made by them for Sears, using the Sears J.C. Higgins trade name.
Marlin High Standard made the Model 75 20 ga semi-auto shotgun for Sears http://www.histandard.info/PDF/Sears%20Shotguns.pdf
Winchester. sales@countrygunsmith.net
price for sears 12 ga.model 101.7
your sears shotgun was made by savage arms.There model number was savage model 96.
Your local gunsmith may be able to clarify whether or not Winchester actually manufactured that shotgun for Sears.
Proofhouse.com has a store brand chart.
The Sears Roebuck 12 gauge Model 583.606 was produced in the early 1970s. Specifically, it was manufactured between 1971 and 1973. This shotgun was made by the High Standard Manufacturing Company for Sears.
Savage Arms and J Stevens made the J. C. Higgins sears robuck and company shotgun. If you look on on the right side of it should say Stevens model (whatever model # it has here) like mine says (Stevens model 311A)
Sears, the 583.19 has a roll mark date of 11/28/49. Sears has a safety recall on this specific model shotgun you should be aware of before firing.
I believe that your Sears shotgun is a Winchester model 37A shotgun that was made for Sears Roebuck And Co,.
The Sears Roebuck Model 20 12-gauge shotgun was manufactured by the High Standard Manufacturing Company. Sears sold it under their own brand name, but the shotgun itself is essentially a High Standard design. It is a popular choice among collectors and enthusiasts of vintage firearms.