I'm about to buy an SKK so I've done some research too! It seems the SKS types with the detachable AK mags imported into NZ and AUS were called SKK by the importers. The one I am going to buy has the same characteristics as what our American friends call SKS-D, clearly different from the SKS-M. It has 'SKS' on the receiver, not SKK. There were a lot more SKK rifles sent to Australia than NZ, but most of them were either destroyed after the 1996 ban, or hidden.