Summary

The Kingdom of Romania purchased 100 RSO/01 tractors in 1943. These were used for towing anti-tank guns. Anti-tank variant: RSO/PaK 40. edit. RSO/PaK 40.

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V1 DETAIL AT MIN... WAS BORDED THOUGH I WOULD MESS AROUND IN TINKER CAD

10.5 cm GebH 40 mountain howitzer on the back of a Raupenschlepper Ost (RSO/1)
The RSO/1 tracked vehicle has the manufacturing company’s name and logo on the side. This is a factory vehicle, not one that has been sold to the army. It is safe to assume that it is the company, Steyr-Daimler-Puch, who was experimenting with showing that the 10.5cm GebH 40 mountain howitzer can be transported on the back of their vehicle.