Morris 6 wheeler movie on U tube
 

http://www.youtube.com/watch?v=n7Spkpjj0KU


These were the 1920's version of the CDSW seen later .

Steep climbing on the tracks :yappy:

The dual drive rear articulating axle was a WD patent design. It was offered to UK truck builders under the proviso that the trucks would be taken into military service in times of war. The 6X4 wasn't much of a seller in civilian markets.