This the suitably odd machine mentioned in another thread, the Panafacom Duet-16
I haven't managed to make out the 68K that's supposed to be in there - there's a chance it sits somewhere on the mainboard where I couldn't point the camera as the mainboard tray is so firmly wedged in there I can't get it out. The complete schematics that come with the machine (more scanning to do over the next days and weeks) will have to make up for that.
The harddisk controller is 6809 based though, and I've dumped its ROM along with the BIOS, char and keyboard controller ROMs.
The harddisk itself is a 10MB affair branded Panafacom, its interface is described by the documentation as AS4000 which would make it SASI.
The second of the blue binders on the next pic (to be scanned next week) contains fold-out A3 sized schematics that go into great detail.
I've manged to dump all but one of the disks and took a harddisk backup before I pried apart the machine. The files are incoming on the FTP, so they should be available soon.