can anyone ID this terminal?

[Richard]

In article <e1d20d630611220916p71efa8e2h4963ffefa70caa06 at mail.gmail.com>,
    "William Donzelli" <wdonzelli at gmail.com>  writes:

> > Any ideas?
> 
> AN/UGC-74.

Hm!  I should have looked at the item detail to scrape that out myself
:-).  I'm so used to those "more detail" links being bogus that I've
kinda got out of the habit of looking at them.

So, googling for AN/UGC-74 seems to imply that this is a "secure
teletype".  It purports to talk Baudot code as well as ASCII.  Does
anyone have any idea what makes it "secure"?
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