The rear label is missing because this is no ordinary Mac - no, its the ultrasupersecret Mac Plus Plus Plus Super Duper Mega Ultra Limited Edition Colour Classic III prototype that has the 75 Mhz 68060, preproduction USB, FireWire, and a never-before seen preproduction version of Mac OS 8 that features all the neccessary support required for the machine. Come on...you all should know that by now! 
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Charlieman: The serial number is on the front, at the bottom of the "lip" where the keyboard port is.
Oh, and I forgot to mention, the Mac Plus Plus Plus Super Duper Mega Ultra Limited Edition Colour Classic III prototype comes standard with a flux capacitor.
[)] ]'>Charlieman: The serial number is on the front, at the bottom of the "lip" where the keyboard port is.
Oh, and I forgot to mention, the Mac Plus Plus Plus Super Duper Mega Ultra Limited Edition Colour Classic III prototype comes standard with a flux capacitor.