[Shuie]

There may be something under the white triangular cap on the heel. Or, it could just be stuck to what's left of the finish in the jointed area of the heel, fingerboard, etc.. I'm too heavy handed to work on stuff like this so I'd get it to a luthier and ask them to separate the body from the neck for me. It's really going to sound a lot better with a nice finish. Cool project.