How do you tell if a console is a genuine Limited Edition

[HIPPEEDUDE]

As the title says,how do you really know if a game console is really a Limited Edition console??
Recently have come across a few Xbox 360 consoles with the owners claiming they are a limited edition console,one of one or one of five.
The reasons given appear genuine as to why they say its a limited edition console,in one case owner was given the console by his brother who works for EA Sports.
Seems a legit reason to have it,problem is how the heck can the average joe(or jane)confirm it is what it is?? When Microsoft were contacted all i was told is the information is
confidential & i am not authorised to know the information. Sounds weird but kind of possible the console is legit & i shouldnt have it at all.Just a thought running through my head.
Next question is,who else did paint up legit limited edition consoles throughout the world? I know you have Colorware in the US,some other company in Germany but who else does
them for say countries like Australia?? I know Weta Studios in NZ did a one off Halo Console,would they have done other consoles for arguements sake?

So to all you console lovers & collectors,how do you ever know if what you have or are buying is a legitimate Limited Edition console??

P.S-This doesnt refer to the run of the mill Limited Editions such as GOW 3,Halo Reach or MW2 Consoles,i refer to the extra special Limited Editions