Interesting unit in Maryland. 

https://www.ebay.com/itm/US-Military-TTY-RTTY-Radioteletype-TELETYPE-Machine-Extra-Equipment-TDD-Rare-/325059430932?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=711-127632-2357-0

Not affiliated just stumbled across it.  

Daniel

K6YIC 

Sent from my iPhone

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