allways thought it was a creepy looking truck,my opinion has not changed,still must be worth a bit now especially to fans of the film
I heard there were 3 of these trucks all used in the film. Corse one went over the cliff 
another disapeared in the sands of time. This one now being the last surviving unit.
The trucks in the film were splattered with old engine oil to give them that colour. this one has had a paint made up to look just like old oil. Can’t see the colour being chosen to paint out houses on the DIY shows any time soon !
The trucks top speed was about 48 mph I think is what thay said on web site. Not 100mph like in the film 
The little box mounted hi up behind the cad was a type of early air conditioning unit. A block of ice was put in side it and the air would flow round it and back into the cab. This is what someone has note on a website anyway. Thay seem to know all the little details about these Peter build 1950/60’s trucks on the web site.