Glad you mentioned that GE remote-control system. I'm not an electrician, but have always been curious about what became of it. It seemed to be heavily promoted for a while, even for residential applications.
For those not familiar with the system, the relays were designed to snap into a 1/2" KO so that the cylindrical coil and its pigtail leads was outside the box, and the square head containing the contacts was inside. The relays could also be gang-mounted in a box with a partition.
In addition to the momentary-contact switch shown, there were also manual and motor-driven rotary selector switches for controlling multiple circuits.
That GE momentary switch is one that is used with low voltage switching, whereby the swich sends a momentary pulse to an "on" or "off" coil in a latching relay somewhere to control lighting usually.. Used to be popular in big buildings and institutions etc.
[This message has been edited by Albert (edited 12-03-2006).]