Mystery chainrings help - What is this?

[bike_nutNbolt]

Got a hold of some Kooka cranks with red large/middle chainrings. The manufacturer's name and model of the chainrings have proven elusive so far. Looking for more learned minds to unlock the mystery.

 

[legrandefromage]

'magic motorcycle' springs to mind but I doubt it.

Some stuff to send you mad:

 

[bike_nutNbolt]

Thanks for the tip BigCheese. The rings do look like they may be CNC in nature. I will look in more detail after I get them cleaned up.