This was the "programmable terminal" that Coach House bought in the early 1970s to run the typesetting, via the VIP.
CDC designed the machine to use the Intel 8008 chip, but Intel delayed production, so it was actually built with a TTL set which defined the 8008 instruction set. Thus, it ran what was basically 8008 assembler. It had a pair of cassette drives, a full keyboard, and a small 80x12 green screen.
Slocombe remembered that the 2200 had a 4004 chip. Can't find any corroboration for this; everything online points to a TTL set that was more or less equiv to the 8008.