So I picked up a couple raw frames from this guy I know there supposed to be prototype S&M frames but there is no id marks anywhere which is not unheard of in the proto world all the research I've done supports dudes story but I was wondering if there is any way to be sure? I mean regardless there quality built and I practically stole them from dude. i just don't wanna go around bragging bout them and someone be like WRONG lol. any help would be awesome and greatly appreciated.