Odd... First off, the first (closeup) pic REALLY looks like the body is bound. Is it? It's tough to tell, but from the second, i'd guess maybe it isn't, but the first... *shakes head*
Just re-read your second post... So it IS fully bound with glow-in-the-dark material? crazy... If so, that's definately not a stock 7421.
Going by the pickups... my guess is Ibanez AH-7's. they're not dimarzio new-7s/custom-7's because the body is black, not brass, and they're not "real" dimarzios, with those black polepeices... which would suggest a lower-end 7. but a few details (i.e- the body binding) don't match up with this.
the body color is really odd. kinda cool, though. Definately not black, if your camera's any good.
My money's on a custom refinish job done to either a 7421 or a 7621. It's definately not a stock example of either of those, near as i can tell with my admittedly limited experience, and if it was an artist model, it wouldn't have been made in japan... or do they only make american artists' guitars in the states?
Also, does the headstock match the body, or is it the normal ibanez gloss black? it almost looks the same color...
I'm really intriqued. Whatevr the case, it appears to be a pretty cool guitar.