Rarest MoPar I've ever seen

What can you tell us about the very interesting remote brake booster? In the U.S. those are called "generally" a hydro-vac unit, and were added to things like old Jeeps. That general type was used here on various types of trucks. I don't think I've ever seen one for a dual system

Couple of types of U.S. hydrovac units, Bendix

64-51886.jpg

I'm wondering since it's from the 70's South Africa, the vehicles common to the area ,jeeps, trucks etc of the time Chrysler decided to use that because of the supply and the obvious right hand drive.