These two Victor Bonnet creations of a tractor and a trailer, were sold together in one box, I have not found any proof anywhere that they were sold separately.
I have come across the tractor in two colors so far, in green and in red, (green and red in various color gradations from dark to light, but presumably the influence of sunlight has also had an influence on the color), I am the trailer only encountered in a brown/yellow color with a green fabric tarpaulin.
What has been noticed is that there are two versions of the tractor, with and without a roof.
Presumably it was marketed in two versions with and without a roof, which is apparent from the fact that the tractor can be found with and without mounting holes for the roof, (see the photos).
Look at the two different trailers, sometimes the trailer has a bronze plate on the back with the text: Charge maximum 5000Kos and the back and front of the trailer has different plating, version with a 6 and with a 4 rectangular layout