I don't have a facebook account and can only see the picture, no text. Do you have the description for the picture?
I checked my source again, it says that two front steering cabs were built in Södertälje at the factory. One version with a 3,400 mm wheelbase and one with a 3,800 mm wheelbase were produced. The facebbok truck looks like the short version, the puzzle truck like the long one. They also differ in some parts (entrance, framing of the headlights).