Sander,
In my opinion it is a genuine CR part, although admittedly i never saw one in real life.
The following picture is of a genuine CR kit rear wheel hub and brake plate.
This part resemble the one above and you can see that is has some markings on the brake shoes and inside the hub.
Though you can see the differences ecspecially on the "air scoop". This type of air scoop i have seen on several bikes so it could be just another kit version but of that i am not sure.
I have seen other versions