Anyone know anything else about these things?
Nuclear Data was a Chicago company that built various bits of
instrumentation for the nuclear industry. I have heard they were
the company whose computers were at Three Mile Island, but have
no documentation on that.
The ND-812 front panel is light/dark green as well. I have one
in poor condition. The CPU is wire wrapped. There are PCBs for
the core memory system.
Bunker-Ramo used them in a point of sale system for supermarkets,
mostly in the Chicago area. Parts for them would show up at hamfests
in the mid-late 70's there, which was the first time I saw one.