[sdiy] An OB-Mx I haven't seen before

[klosmon]

Hola -
Was recently given this unit for service -- it's radically different from 
the OB-Mx units I've seen previously (& are detailed on the web at sites 
like Vintage Synth Explorer).

Photos here: http://www.analogsynthservice.com/aux2

The front panel is laid out differently;  the firmware is version 1.1.
The second photo shows the interior:  a computer power supply, next to that 
the main board, and next to that one of the dual voice board sandwiches -- 
each voice board pair has it's own power regulators and it's own input & 
output jacks on the rear panel.

Has anyone seen anything like this before?  -- or could it be a prototype?

Thanks.

~GMM