Plane of core memory

[wrcooke at wrcooke.net]

> > > Does anybody here have any ideas? For example, what is it? Or, if you don't know, could you point me in the right direction so I can do the research myself? Thanks!!
> > I have no idea.
> > 
> > The connectors remind me of a DEC machine bus, but I don't know what the bus name is. I also find it odd that memory would plug into the system bus like that.
> 

I wouldn't have a clue what that came from, but here's something to consider.  The seller is in Huntsville, Alabama, home of many, many military and space contractors.  It could very well be from some very odd piece of very low volume military or space equipment.