You might check your local library for old catalogs.
You will need to find out who made it first.
www.e-gunparts.com
find a collector i sold my sears and roebuck for 750 im sure you can get quite a bit.
http://www.histandard.info/PDF/Sears%20Shotguns.pdf
I have one for sale. Message me @ garym6@cox.net
That should be a Savage/Springfield Model 18. If you can't find parts from a local gunsmith, try http://www.e-gunparts.com i have a sears roebuck bolt action .410 shotgun model 110.1120 3''. i need the shell ejector piece. to get a clip for a shotgun try marlinguns.com.
Try Numrichgunparts.com
http://www.e-gunparts.com
In sears
Sold by Sears Roebuck around 1900. Probably manufactured by Crescent Firearms, Norwich, Ct.
The sears model 200 is a Winchester 1200. That will make it easier to find info. I have one of these, with adjustable choke and vent rib. It is a sweet shooting and smooth little shotgun.
i want to know how much a 1908 sears and roebuck catalog is worth.