[Milsurplus] RF SPDT Relay ID?

[Nick England]

Does anyone recognize this gadget and know what equipment it was used in?
Navy Type CG-29859 so after 1945 and made by GE
http://www.navy-radio.com/misc/mys/relay-100_1408.JPG

Cheers,
Nick England K4NYW
www.navy-radio.com
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