I was told by DiMarzio that when they first started they Did make pickups that did Not have their name on the Bottom.
I believe this to be one of the first DiMarzio Super Distortion pickups that they made.
It reads out at 13.68 K ohms, the same read out as
the Original Super Distortion, according to the DiMarzio web site: 13.68 K Ohms.
The Brass bottom is identical to other Named DiMarzios that I have dealt with, as is the wiring, and other signature Super Distortion characteristics.
"The Pickup that Started it All".
Please look at all pictures closely and Ask any questions I may have left out.
Thanks!