[Quicksilver]

Assuming the new info is somewhat accurate my wild guess is that 904-054 was wadded into a ball and then repaired by jacking up the radiator cap and installing a new car under it. The rebuild may be a valid car if the repair wasn't a rebadge using another VINed car. If the factory provided a "body in white" or just all the parts then it was a valid rebuild.

If this is the case... Which is the real one? That would mean that both of them were basically built from scratch. The only differentiation would be that the one in Sweden would have original engine, trans, and other bits.