Janos,
From what I gather from the VIN decode, I believe that the car was orginally delivered TO someone in the DPRK, we can only guess as to who!
If the car was a consulate car, they are usually delivered through dealership network of the destination country and the orginal dealer would reflect this. (So it would display as 'Canada' VS. DPRK)
Also, a 560SEC would be a rather strange choice for an official consulate car as the 560SEL was a far more popular choice.
- Steve