The stamped logo appears to be real. I don't remember in white. Also, don't recognize the bumper, but bumpers can be replaced easily, though this bumper appears to have a screw attachment and most McDermott I've seen have a push in bumper??? It could be one of the early McDermott cues which is the answer to my above. If you didn't pay over $100, you probably got a good deal (leather wrap and all!).
I don't mean to be a dick, but why would anyone counterfeit a McDermott?
I've seen a few worth counterfeiting but this one? I'd have to think it was a real one.