via this auction
This one was spotted and sent in via M Me.
Google translated from the listing: "Estate : H.E.M. Electronic music machine 60s 70s for hobbyists and collectors approx. 60x48x16cm weight approx. 27 kg (what is that? Origin? Think what for musicians. Function? Plug and cable are missing. So what for collectors and hobbyists See pictures for condition!"
Not finding anything else about this machine out there. It appears to be a preset organ expander with rhythm mahcine. They also made a STRING-PHASING, chorus/vibrato effects pedal pictured further below. If you know anything about them feel free to leave a comment at the bottom of this post.
