[GreenKeys] 6 bit Teletype reperf

[Jim Taylor]

These reperfs were often positioned somewhere between a Model 20 
(6-level M15) page printer in the news room - where the copy is read and 
decisions made as to whether to run it, etc. - and the typesetting room 
where the 6-level tape could be directly fed into the Linotype machines 
used to create lines of type to be compiled into newspaper columns.
Those are definitely works of art as well - fascinating to watch.
73,
Jim, K9JT