TRIAL was the Hungarian marketing company, whereas Politechnika (later Politoys) was the 'factory' that produced the cubes.
Konsumex was the only authorised export company.
Here is another, still earlier example of a promotional cube, for Chemolimpex, in the blue cardboard box:
On the cardboard box you can see Politoys and TRIAL.
So they made a cube (picture in my previous post) to promote themselves!
Still another promotional cube (Politoys - East Germany)