I've got a friend's ESP M-1 from the mid/late 80s (see
here) which I've been looking after for a few years as he is in Hong Kong.
He's taking it back soon so thought I'd strip it and give it a good clean up, and taking the zebra bridge 'bucker out I found this underneath...
http://i.imgur.com/qpWUOvb.jpgSweet! A Seymour Duncan JB humbucker, that explains the hi-gain crunch!
But this is not just a JB, it's a JBJ which means it was wound and built by Custom Shop guru Maricela 'MJ' Juarez. By all accounts she put a certain magic in to her JBs.
Anyway it seems like a nice score.
Comments
I had a JNJ (jazz) once and stupidly sold it. It was a fantastic sounding pickup.
I often browse ebay as i'd like to find another one.