[GreenKeys] Character wheel test bench + more goodies

[Jim Haynes]

Also note all of the Western Electric flat-type resistors toward the back 
of the machine, and what might be Western Electric relays to the left of
the resistors.  The four-row keyboard suggests a 6-level code, hence a
stock ticker sort of machine.  Wonder why the Western Electric resistors
if the company had not yet been acquired by the Bell System.  But then
Western Union also used a lot of Western Electric parts back then.