At first sight I assumed it was a D-Series but after seeing that it has a protruding front axle it appears to be rather a W-Series. It looks like a shortened chassis. By the wheels it is maybe a W-500. The grille can't be seen, so not sure of the year.

http://www.flickr.com/photos/howzey/932284468/sizes/o/in/photostream/
http://www.flickr.com/photos/howzey/931434505/in/photostream/
There is a photo of Brinks armored truck, that was taken in Tabernas, Spain.
Near it you can see the other truck from post-apocalyptic movie Solarbabies, that was also filmed in Spain in mid 80th. Im interested whether the white truck was ever filmed in other movie. Does anybody know the model and year of this truck?