Most of the cataloges list it as exotic inported hardwood, in most cases this was shedua or bubinga. The higher end models had East Indian rosewood and East Indian laurel.Your riser looks look shedua to me as it is just a little more red then the bubinga. The early years had rock maple and black walnut. Some years early with more maple, then early 60's more walnut.Your Rover became the X-132 in the Shakespeare line up afteer Root was sold.