Back then there were all kinds of wood combinations going on that may not necessarily have been custom. I saw a couple of photos of your bass online, beautiful! Looks to me like walnut top and possibly back, maple core with center walnut laminate, neck maple, walnut and beech, Ebony fingerboard. The center core walnut laminate may have been intentional or could have been to compensate for a mis-cut with the body thickness, who knows but that is a nice touch! Beautiful, congratulations! 😊