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via
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Moog CE aka Modusonics obtained the rights to the Moog brand after the original Moog Music went under in 1993 according to
Wikipedia. It was founded by Mike Bucki.
via the listing: "I have here for sale an Extremely Rare Moog Keyboard Mixer made in Moog's Custom Engineering Department between 1980 -1982.

I have not very much info on how many were ever made, when exactly were made but I do know that these were manufactured in very limited amount and not as a product that was intended to sell to the masses but as an addition to some of Moog's clients that needed something portable when performing with several Moog Synthesizers. I guess it was an alternative to the amazing Moog Synthesizer Amp which also served as a mixer + more but the SynAmp was a very heavy piece to carry around so they came up with this baby...

SPECIFICATIONS ABOUT THE MOOG KEYBOARD MIXER:
- 8 Channel Line Input Mixer With Level & Panning Knobs Per Each Channel.
- Dual Stereo Output for Either Lo or Hi Output
- Stereo Auxiliary Input
- 17" Spring Reverb (Dual Springs)
- 8 Reverb Amount Knobs For Each Channel.
- Dual (A+B) Send/Return Effects Channels W/ Level & Panning As Well.
- 3 Band Semi-Parametric EQ (Lo, Mid & Hi)

- Cutoff Frequency Knob In The EQ Section As Well...
- Headphone Input With Level Knob As Well.
- A House Kill Switch.
- Level Knobs For Left/Right Output.
- Overload Indicators (LEDs) For Every Channel Including Effects.
- Effects On/Off Inputs By Foot Switch. ( A/B + Reverb)
- Effects Send/Return Input Jacks For A, B & Spring Reverb As Well.
- It's a 19" Rack Mountable Unit (19" X 15 3/4" X 4 3/4")
MAINTENANCE GIVEN TO IT:
- All Electrolytic Capacitors have been changed by new hand picked tested ones.
- All PC Boards cleaned with Isopropyl Alcohol to remove dirt and contamination.
- All solder joints checked and re-tapped when needed.
- All electromechanical Connectors have been cleaned and tested for conductivity.
- All Potentiometers, Switches, Jacks, Etc. Have been cleaned and lubricated.
- A New Spring Reverb has been added.
- Power Supply Refurbished for better performance."