We love our high complications and luxury masterpieces as much as the next watch nerd. But our bias is for timepieces that can “do things,” watches that are each an essential piece of kit. Sure, it’s an instrument for telling time, but it can also be used to time a dive or a racing lap, take a pulse, or calculate remaining fuel or crosswind speed or the distance of thunder or artillery. How, you ask? The answer has little to do with the watch’s movement. It’s all about the bezel, that outer ring of metal (or perhaps, nowadays, ceramic) surrounding your watch’s crystal.
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https://gearpatrol.com/2019/08/12/how-to-read-a-watch-bezel/