I`d heard about this last year an unknown german 1/2 track, pulled from the Pillica river in Poland, and then restored. Sorry I`m no good at my age doing links but I found a little gem of it on you tube last night. It was published April 14th 2009, it`s not long, but worth the look under, "Previously unknown Armoured Sdkfz 8 Variant "
Cheers