Re: Is this RG-7621 ? (56ers, beware)
The pickups in the RG7-621 are DiMarzio, but they are not Blaze's. My 7-621 is still in pieces, so I don't know what the pups sound like... I've been slowly customizing mine. The fretboard just came in today... should have her done in a few weeks, time permitting.
If it's got a '98 serial, it's got to be a 7-621. The 7-421 was a couple of years later. Best way to tell for sure, if you're that curious, is to pop the neck off next time you change strings and take a look at the neck heel & body stamps.