Gotta love some bureaucracy…And a typical reasonably priced Opel owner that can't be bothered to put matching hubcaps on their car. If you don't have four matching ones, at least make them match per side.
Finnish plates starting with D and W (and P, at least way back then) are typically used for trailers. Pretty interesting that the stale government authority that is Traficom allowed a car owner to buy a D plate. These are the same people that currently are issuing plates that read KUK which is swedish for "cock", and not the male bird kind. They're telling angry owners of brand new cars to basically pay for a custom plate or get lost.