Erich posted these links in a thread from 2004 about the Kettenrad.
kettenkrad.com, kettenkrad, kettenkraftrad, military vehicles
Die NSU Kettenkrad Homepage
NSU-Kettenkrad

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For the first time I have seen "History" at close quarters,and I know that its actual process is very different from what is presented to Posterity. - WWI General Max Hoffman.

I'm the "Confederate with a pipe"!! LOL