[GreenKeys] Looks like Stroboscopically-tuned Teletype Baudot Test-Set

[David Burns]

 From what I can see in these ebay pictures 
<http://www.ebay.com/itm/320874202604?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649> 
this unit appears to be a stroboscopically-tuned distortion test-set for 
5-level Baudot equipment...real Teletype engineering...all mechanical, 
electrical, no electronics.  I'll bet they didn't make many of these.

Of course I'm guessing from the labels on the control switches and the 
fact there's a little window at the start of the fifth bit that seems to 
be part of a rotating plate on the front panel.

Anybody out there actually use one of these in real-life?

-Dave in Boston
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