Two years ago we tryed to discover the make of this vehicle:
The currend issue of "Schlepper Post Sonderausgabe 1/2010" deals with the story of early German tractors, i.E. Poehl, Komnick, Kaelble ...According to those articles, the following pic shows the undercarriage of a Kaelble artillery tractor, only two were built. Unfortunately there seem to be no further records concerning this impressive vehicle in the archives ...
The same issue has some very interesting pictures of the Poehl artilley tractor too! Here is the link: http://www.verlagrabe.de/
Cheers, Peter T
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"Siplicity is the ultimate sophistication" -Leonardo Da Vinci-