I had the same pickups in my first decent guitar, a Sekova Les Paul copy. They had closed covers, but when I took the covers off that was what the pickups looked like.
Probably a very common Japanese pickup at the time.
I looked at that catalog page. The Les Paul Custom clone was exactly the same as my guitar, same knobs and inlays, except mine was black on the top, and had the same pickups, but with closed covers. I ended up stripping the top on mine like that to look like Mick Ronson's guitar.
I guess the guitars were marketed under different names. I don't recall seeing Ibanez back then, but Sekova was common. Mine was also from 1970-1971.