Is it possible to rebuild or repair these? Currently it just spins free. Also, how are these supposed to be controlled? Other than the former owner using a wire to pull and hold by hand, is it supposed to be like a light generator?
![IMG00192-20100419-1849.jpg](https://proxy.imagearchive.com/306/306da87bb15457beee9af27cd1dd451e.jpg)
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