But it looks like a Japanese very late 1970s / 1980s PU to me???
The japanese "coppied" the "new" DiMarzio J-HBs with and without screws, with cream and black cover.
On the other hand the copper foil around the coils seems to be selfmade / non-tpically-Japanese? Maybe it was put on later???
thanks for the replies so far guys, seems like we're close. I don't know what kind of material the bobbins are made with, they're covered with black cloth. But if this is a duncan that would make me be happy lol