This is a hard-to-find key which consists of two strips of metal which are held in the hand
like a gun or scissors, and brought together to make contact and send a light signal
with an external light gun. The key and light gun and tripod and other accessories
and carrying cases constitute the SE-11 Signalling set.
The key is supplied with a long wire cord so that the operator can stand FAR away from
the light gun while sending signals. The light gun is obviously a tempting target for
any enemy and therefore the long cord was literally a life-saver.
Most of these keys are painted olive drab and engraved J-51. Other models are painted black.
