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Caption: A steel wheel turned with a key winds a spiral spring in Leonardo's wheel-lock mechanism. On the right is a flint-lock. When the spring is released, the flint strikes a metal bar to make a spark. Leonardo da Vinci (1452-1519) was an Italian Renaissance architect, musician, anatomist, inventor, engineer, sculptor, geometer and artist.
Credit: Album / TopFoto
Image size: 3678 × 2807 px | 29.5 MB
Print size: 31.1 × 23.8 cm | 1448.0 × 1105.1 in (300 dpi)