On the purple label, it has 6.5R on it, but it has the smooth can/endbell. It has a black timing ring, so it doesnt seem to match up to any of the descriptions given by Novak on their website....
It had a very slight notching feel to it, but the rear wheels turned very easily.... I am not sure now!! LOL
I have a spare sintered rotor as well. It might be worth trying it to compare....
Mark