Trucks in Hungarian Service to be Identified

[Dénes]

"A picture is worth 1000 words" - they say. True.
Here is a photo of a restored Ostner "Rex" 4:


[Source: www.hanomag-kurier.de]

Could you find, by any chance, the main technical data of this little known truck, so I can compile a vehicle data sheet?

Thanks,

Dénes