Thanks, HotLine1!
Yes, in fact GE still makes the relays and switches, though the switches and relay boxes ("tubs") are different and some of the components (that 1960s-cool two-knob master switch, and the motor-driven master controller) are no longer made.
The relays actually have some nice features for modern control systems: the latching function lets the system maintain its condition through a power failure, the separate ON and OFF coils give positive control, and the pilot contacts (on the RR9 relay) provide for indicator lights and status supervision.
In fact, I'm toying with the idea of using an inexpensive PLC with the GE relays to implement some simple control functions, like allowing the use of two-wire (SPST) pushbuttons and maintained-contact switches in place of the three-wire controls, controlling groups of relays from a single switch, and allowing an outdoor-lighting circuit to be controlled by either a local switch or a master time clock or photocontrol.
The product documentation is a bit hard to find (for me, at least) on GE's web site, so here's a link which might be useful:
GE lighting control booklet 
