Question about PDP-8 thing on eBay

[Vincent Slyngstad]

I was looking through my eBay search mail (which has been wonky since 
way before the recent "upgrades"), and encountered this thing:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170155699367

which claims to be a "processor control module" for a PDP-8.
The pictures show that it is clearly a 12-bit something or other, 
which gives some credence to the theory that it is PDP-8 related.

I thought I knew a fair bit about things PDP-8, but I have no idea 
what this could be, unless it is some kind of front panel replacement 
for an Omnibus machine.

Anyone know what the heck it is, and if it is really a PDP-8 thing?

    Vince

(I'm assuming the "Gemini E" is some kind of machine controller, 
likely based on an 8/A or the like.)