Is this REALLY a White Bros 400ex Rev Box?????

[leprogle]

I bought a 400ex Rev Box off ebay, and I'm not sure if it's genuine or not? anyone else have one? it has WB engraved on the side of it, and says Shindengen on the back.
Any help or knowledge would be greatly appreciated, I got it for a friend, but I don't want to rip him off with a fake.,
He sent me pieces of the original box, (in picture), so I hope it is real

[TravEX]

I don't remember what mine looked like before i sold it, i think they all look alike. Is there any thing printed on the back? The WB is harder starting in cold weather, and revs higher, doubt you could tell them apart that way or not.

[deathman53]

its a xr250r cdi, nothing else. thats all the wb rev box is, and yes, it looks like it.