[GreenKeys] Does anyone know what this is?

[Derek Cohn/WB0TUA]

Hi Everyone,

Does anybody know that the following item is?  Since it's in with a bunch of 
teletype equipment and marked Bell System, I'm wondering if it's something 
to do with teletype.

http://webpages.charter.net/mecograph/P1010001.JPG

Thanks for any info you guys can offer!


Derek Cohn
Morse Telegraph Club - Alton Chapter
Office UD, Sine DJ
Amateur Radio Station - WBØTUA
1969 Brunswick M274A5 Mechanical Mule