Ever wondered what the things around a watch face are for?
Mark from Long Island Watch made a good video on what all the different bezels do and how to use them
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one that's missing is the Doxa-style ND bezel but that's incredibly niche and is basically just a count-up bezel with an extra bit around the edge for no decompression times
there's also this which is a tide-time bezel but I've only ever seen that on this particular model of Sinn
Super cool though, even if it's of no use to me whatsoever