Maybe I can add a little bit: this 3 wheeler is insured and taxed in Austria. At least the rear number plate indicates an Austrian registration.
No Austrian front number as she must have a motorbike registration
That really is a lovely 3 wheeler Hannes and that's a Vienna number plate so I hope to see it around. CM told me that many of the post war 3 wheelers were exported to Australia so that would explain their rarity in this hemisphere.