These photos were taken by Glen Hutley and the information provided below details his recollections.

These vehicles were not actually prototypes, but pre-run evaluation vehicles. They were subjected to 6 months testing in tropical conditions around Innisfail. The 6x6 trucks were fitted with Mk3 cabs (Note inconsistent bridging signs) and wired extensively to measure temperatures at every concievable point.

The 6x6 cargo was loaded with 5 tons and towed an ex WW11 semi articulated trailer on a dolly converter (effectively making the trailer a dog trailer) from Melb to Innisfail. The dump was loaded with 5 tons of aggregate (checked daily) and towed a 5.5" artillery piece. (one of a kind fitted with air brakes)

Another vehicle travelling with this group was a Series 2 Land Rover Wrecker conversion, the first one in fact. Once it had posted for it;s ADE photos she did a trip to Innisfail with 6 Tropical Trials along with the pre production International 6x6 cargo and dump variants and other varied equipment including a couple of light recce tracked vehicles to replace the Ferret (which were not accepted) and also a S2a COE 1 ton Land rover (which also was not accepted.)

In later years Tropical Trials became a permanent unit with a base at Cowley Beach that is still partially operating today.

All photos are Copyright Glen Hutley