Hey, look, it's got
Dimarzio Super Distortion written on a bit of sticky tape on the base - that must be what it is......
Sorry, couldn't help myself. Check the impedance against what Dimarzio states an SD should be on their website - that might be a clue. I suspect the only thing Dimarzio ever do is put a DP number on the base of the pickup, and I'm not sure they even bothered with that a few years ago........