[GreenKeys] Dow Jones Teletype machine

[Jim Haynes]

I suspect it is a start-stop machine using 6-level code.  There was an
article in one of the ARTS bulletins about modifying something that
sounds like this to work on 5-level code in the early days of amateur
RTTY.

When you say it works like a ticker, I think that means the post-1929
ticker that used a 6-level start-stop code, rather than the earlier
glass-bell-jar tickers that worked by a sequence of pulses.