Zach-

Sounds from the high serial number as if you have one of the Stewart banjos especially built for sale by Sears Roebuck. One can determine what grade it is (1, 2, or 3(best)) by the layers of veneers under the finger board and the amount of mother of pearl inlay on the fingerboard, and the carving on the heel of the neck.

Mugwumps is a website dedicated to Stewart banjos which you and others might find of interest.

If you could provide a link to an image of the banjo I and others could tell you more.

Charley Noble