warlockII
Fractal Fanatic
Unfortunately the only way to tell would be to un-screw the PU from the top (after removing the strings) and possible even un-solder it. Not something a wish to do at this point.
You should be able to loosen the strings enough to lift the pickup high enough to see under or even slide it between the body and the strings. Without looking at the bottom, you are guessing as multiple dimarzio's look identical from the top. Additionally, I wouldn't think your readings would be accurate unless you had it out of circuit, but I'm not an EE so I could be wrong. I'm a huge Dimarzio.