When was my mass arms 12 gauge breach loading shotgun made?

There were two makers of Mass. Arms Co. shotguns, Stevens Arms & Tool Company and Crescent Fire Arms Company. If the gun was made by Crescent it was made before 1915 and if by Stevens it was made after 1920. A quick way to identify the maker is to look at the butt stock where it joins the frame. A Crescent made gun will have a smooth joint. A Stevens made gun will have a small semicircluar projection in the wood. The guns were made for and sold by Blish & Stillingham Hardware Company of Atchenson,KS.