Subharmonicon - Rare prototype photo

Deaton-CA-SOYS-Subharmonicon@1400x1050.jpg
Sauce:
https://musictech.com/features/studios/show-off-your-studio-deaton-chris-anthonys-la-based-creative-hub/

https://reverb.com/item/34102887-moog-subharmonicon-moogfest-2018-engineering-workshop-edition

Moogfest 2018
Does anyone know anything about this early version?

As far as I remember, this is one of the first ones, those that were built by the Moogfest participants.