Still a ZZ as far as I can see. That's not a bad thing of course. I'm still getting a hang on FH nomenclature and naming. Your breeder is obviously calling the strain "king diamond". However, the fish (even to my uneducated eye) shows all the ZZ chracteristics. SO I guess King Diamond is a ZZ strain.
Not king diamond. Its a lampshade pineapple donkey kong dragonhorn. haha
But really, Hes from Louhan4Jersey? Did you get him as a fry or something? I hope you didnt pay $200 for this fish because the ones L4J are advertising look much nicer. Full double row, big head, Fan tail, beefy doral fins, better shape.
Might be the photos but something looks fishy. Heres a link to the real Vietnam king diamonds L4J sells, http://www.monsterfishkeepers.com/forums/showthread.php?t=361572
Compare the facial features/tail and Im pretty sure you will see its a different breed. Theres too much ZZ in this fish.