Today at TRW turned out to be rather interesting. A friend of mine was
selling some stuff that included a funny module that didn't sell and I
ended up with it. Turns out that it is an Amplifier Module (red/green
front) for the Electronic Associates TR-10 Desktop Analog computer. Doug
Coward has a picture of the computer on his site at
http://dcoward.best.vwh.net/analog/eai.htm.