Useful gadget seen in a 1923 issue of a Gernsback tech mag.
A flashlight powered directly by a miniature generator. No rechargeable battery needed. Supposedly made in France.
The light was in the end of the generator itself. The optional wire is a speculum used by doctors. The description isn’t complete; I’d guess the little squeeze handle drove a crank or cam to a geared-up generator. A direct crank would need two hands, while the squeezer does it all with one hand.
Polistra's Mill 