Evening Gentlemen,
Ofcourse Tony and Pand65au are correct - this is one of the Prototype 6X6's
The "give-away's" are the Mk3 bonnet and tank, as listed by pand65au. The production run of this vehicle as many ( or all ) of our Viet-vets can atest, had a pressed steel bonnet and pressed steel tanks.
Here's the half-track version. ( once again I am not sure where this picture came from, so go and have a look at Keith Webb's
www.oldcmp.net because its a bloody good site and I probably got it from there anyway )
Pedr