Does anyone know what 1:10 Car I have here?

[Robbe]

I want to sell this car on German Ebay and I want to know what manfuacturer and model it is:

http://test.boettcher-online.com/_images/04.jpg

http://test.boettcher-online.com/_images/05.jpg

Some add. Info:
- it is 4WD chain driven (in fact it is two chains: One from the main sprocket two the differential gear and one from the rear differential gear two the front differential gear)
- it has a two gear main sprocket
- I bought it in the late 80ies in Hong Kong

As I need to specify the type, help is appreciated! Thank you very much in advance!