[GreenKeys] Newbie question on piece of gear.

[THOMAS SMITH]

I'm new to the list but not to RTTY. I've got a model 14 (because I like mechanical things - OK?) and a some Hal stuff like the ST-6 which I bought new and more lately a ST-6000. 
In my poking around under the hamfest tables, I came across a Mite Corp AN/UGC-40 (CY-6063/UG) which appears to have a Navy tag on it. I was wondering just what this is and is it useful for anything? It makes the same great RTTY noise, just like I enjoy hearing in the background but I'm wondering if it has any function beyond making a great sound.
Any help greatly appreciated.
Tom N5AMA
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