Thanks Pal:
18 ordered in 1934 for a price of Austrian Schillings 70,000 per vehicle.
Vehicles were delivered mid December 1934.
Their primary purpose was as an Artillery Tractor, carrying ammunition and spare parts in the body and towing the artillery itself.
I assume from the width of the cab that the gun crew was also carried in the cab.
I have not seen any photos of the vehicle in action in WWII and I would imagine any survivors after the annexation of Austria
were probably kept there for local defense.