The green cab is an unfinished restoration project belonging to a collector. The nose may or may not be original. Without context or additional info, the green cab is basically useless for clues.
You also have to understand the low production numbers. If they ever did a mock-up, it ended up on a rolling chassis being sold. Each and every cab was a handbuilt prototype and cost the equivalent of a middle class sedan. I doubt there were more than a dozen of those “Hoogeveen”-Scanias, if not less than that.