870 and 700
Winchester
Your Sears model 200 shotgun was made by Winchester.The model 1200 Winchester is the same firearm.
The Sears model 200 is a Winchester Model 1200.
I believe that your Sears shotgun is a Winchester model 37A shotgun that was made for Sears Roebuck And Co,.
The Sears M300 (also sold under the label Ted Williams) was manufactured by Winchester. The M300 is almost identical to the Winchester model 1400 shotgun (with minor cosmetic differences).
It is the Winchester model 1400, made for Sears.
Winchester, same as model 1400.
I believe at one time,. Winchester made a model for sears. I had a sears M200 20 gauge and it was made exactly like my Winchester Modell 1300 ranger,.. very, very similar.
The Sears 200 is a Winchester Model 1200 with some minor modifications. Winchester 1200 of the same gauge will fit the Model 200 receiver. Buttstock and trigger group will not interchange.
The Sears Ted Williams Model 300, semi-auto, shotguns were made by Winchester. The Sears 300 is the same as the Winchester Model 1400.
Winchester 1200
Stamped on the receiver and probably the barrels, too.