Indeed it was the No 15.
I found another page with the same car:
http://www.autotrader.pl/details,30490,109454292.asp

Hi I do not own a CSK, but as I can see you look for all cars in the world- there was one sold a few month ago in Poland. http://lr.pl/komis-samochodow-terenowych On this list you can find an already sold 1990 CSK. If interested- you can mail the page administrator and find more about the car. You c...