By rear contour I think you mean not the entire back, but the "beergut" cutout is all black. Cheapo copies have this to disguise a body made from more than one laminate of wood or even ply though. Early mexican fenders I have seen also had this. Not sure if current ones do or what they were trying to hide - my guess is that laminates of more attractivly grained wood is stuck to the top & bottom of plainer wood, so it doesn't always mean it can't be a real fender.