Well, ..... I can't be sure that the canopy IS watertight as it doesn't look like this truck has seen any water for some time!
That's about 1/8" of dust on the dash, and the windscreens aren't exactly crystal clean! Interior is all intact and original.
All that dust has done a good job of preventing the paint from fading, the Army Registration Number 41074 is still legible on the bonnet sides. A check through the AWM records will reveal the original body variant for this truck.