In the world of modern portable devices, it may be hard to believe that merely a few decades ago the most convenient way to keep track of time was a mechanical watch. Unlike their quartz and smart siblings, mechanical watches can run without using any batteries or other electronic components.
Bartosz Ciechanowski’s article explains the workings of watch mechanisms. You can drag the device around to change your viewing angle, and you can use the slider to peek at what’s going on inside.
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