(( F-K )) Guess What?

 

Guess What?   Try to guess, why should the people of Paris had this device in the twentieth century?                 This unusual gadget was created as an exact midday hours. How did it work? At noon the sun's rays focused through a lens and a small burnt fuse gun Shot from which signaled the coming of the lunch break. Quite an interesting and creative invention of the early twentieth century.