French (?) truck in Eastern Germany

[Wendax]

Possibly very easy for our truck experts. I found this picture taken in Leipzig in 1950 on the occasion of the 40th anniversary of the Olus-Gesellschaft Hromada & Co. The big truck on the left looks like a French wartime tanker to me, but I couldn't find a perfect match. My guess would be a Renault. Who knows more?

[grobmotorix]

I go with Renault, too, however I have no idea about the correct model designation.
Those were mostly 3- or 4-letter combinations.
Those are AFK / AFKD truck in use by the German military - still different.