Prewar Gibson Banjo ? 1933 tenor

I have a tenor banjo (one might question if it is a Gibson as the headstock Gibson logo is missing,) yet it has the stamped  markings on the rim as being a 9717-15 - patent applied for -  and also on the resonator it has marked in red pen - 9717 with the dash 15 marked in chalk. Also there is a big 97 that stands along which is marked in chalk on the resonator.. The trim on the neck and the resonator match.. ? could indicate both go together..  It also has a metal pan resonator with it  ( still can be used)  which was attached to the Coordinating Rods (two of those) .  It is my understanding that Wood resonators were not introduced to these banjo until 1925. Best I can determine the serial number fits the ranking of Gibson Serial Numbers of the Golden Age Era as a 1933. I could only guess that someone out there might have had an experience with these banjos.  It is original and has not been  converted.. It has its issues. but overall it could be a great banjo.. Best I can determine it is all original.  I have google some of the TB 75's and more and found a few that matches what I have.  It does have the Heart and Flowers fret board and part of the head stock design showing, too,  that is without the Gibson Logo (weather cause the glue to come loose ? and the some of the design broke off) .  If you have any advice, knowledge or comments please post.. I am getting a few variations that makes no sense even from those professional neck makers and others... which what one or two  knows does not even come close to the description.. I have been a member of the hangout for a long time, but, I have never posted... neither have I uploaded any pictures, but I guess I could -- with some help.  So out there somewhere in the mist of all of you help me with my banjo..This Banjo was acquired through an estate auction  sale...Gibson Says it is not a Studio King.. as might be guessed by some.... as  the serial numbers do not line up... with the time frame in which gibson made a few for Mongomery   ward.. (1929 to 1932..) those being Models 641 plectrum , and a 645 tenor banjo.. This information montogomery  ward information  came from Gibson..Thanks.. Jack