This is from an Epiphone LP custom Korea that I just bought recently.It says 'DCJ'. Sounds good, I'm thinking it's a Duncan Custom. Then again, what does the 'J' stand for?
Re: Which pickup is this? Don't understand the markings?
That's a late-'80s SH-5 Custom, probably from '87-'88 judging by the baseplate and assuming no top logo. If it says "Seymour Duncan" on top (on the bobbin) then it would be '89 or later.
No different than any other Custom aside from the fact that MJ's hands graced it at some point