I think this show took place at the tractor museum in the humourously-named Windpassing (see
http://www.traktorenmuseum-windpassing.at/index.htm). Here is the information I have on some of the engines.
HSCS TE/self-moving PE #58768 of 1927. The rear wheels have the MAVAG name on them though, so perhaps they provided conversion kits for various portables to make them self-moving?
Brünn Königsfelder RR #1262 of 1916.
Umrath PE #1702.
MAVAG PE.
