Jake's on the money.
It's an NC23.
It does, however, have an R6 nosecone, so you've got that much, Gem, and not a CBR600RR, but a CBR1000RR tail (and saddle).
It was left on tarmac on a stupidly hot day, the stand sank into the rapidly melting tarmac, and it fell over, so Pat went on a bit of a mission to fit some different pannels to it.