I believe that your Sears shotgun is a Winchester model 37A shotgun that was made for Sears Roebuck And Co,.
You would have to list the model number of your shotgun,to identify the maker of your sears and roebuck shotgun,in order to get the correct buttstock.
need a diagram of sears model 66m shotgun for takedown
Without a model number and the condition of the gun, impossible to answer.
100-300 USD. http://www.e-gunparts.com/crossref.asp
You will need to find out who made it first.
The Sears and Roebuck Ted Williams shotgun retails for about 250 dollars in excellent condition. This gun can be purchased for less than 150 dollars in used condition.
value of a jc higgins 101-40 shotgun