Clues:TRY TO GUESS WHAT THIS IS BEFORE YOU LOOK AT THE PICTURE.
1. Known as Radio Set SCR-578.
2. Transmitter name BC-778 (2 tubes)
3. Commonly known as a "Gibson girl".
4. Built during the early 1940's.
5. Operated on 500 kHz at QRP levels (4-9 watts)
6. Used up to 300 foot end-fed long wire antenna.
7. Human (hand) powered.
8. Designed to be held by your legs.
9. Contained cam operated Morse Code keyed messages.
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Sam AE4GX
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http://ae4gx.home.mindspring.com/scr578.jpg