Hello all! I am the current owner of this Hofner. I just got messaged by Eiji and looked up this thread.
I created an account here a couple months ago to ask some questions about it, but never got around to it. I’m honored this made it to the boards all on its own

When I got the bass it was wired in stereo with a 1/4” output. No active electronics. The pickups are labeled “hi-z” on a piece of tape on the back, which implies to me that they came from somewhere that made lo-z ones as well?
I believe the pickups are single coil, and not RWRP as they don’t hum-cancel. There’s no dummy coil to be found. The electronics in the cavity do not look like a very high quality job (I’m away from it now so can’t post a pic)
It’s a really odd piece, which I bought impulsively on reverb based on the look and story (old Alembic looking bass bought at San Fran police auction in 1980, how could I resist?). But I already have a violin bass that is apparently unbeatable at the Beatle thing, and a Starfire that covers all the active ground I need, so cool as this is its kinda redundant for me.
I’m at a gig right now but would love to chat more about this later. Thanks y’all!