Help identifying Klein Pinnacle with weird serial number

rakishrider

Retro Newbie
Hello - So I have been holding onto this bike for a while and just now came to sell it and noticed that is has a unique serial number, which is "PTT000000". I am wondering if this is maybe a very early bike or prototype or maybe custom built? Can't find any info on the various forums that would help me identify it but there is no doubt it is genuine and it is in almost new condition. Any ideas? IMG_0468.jpg
 

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