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![ULYSSE NARDIN DIVER X 44mm 3723-170LE-2A-BLACK/3B Skeleton](https://askme.watch/sites/default/files/styles/watch_full_content/public/watch/images/3723-170LE-2A-BLACK_3A%20tissus%20copie.png?itok=c1LRbxiU)
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Divers offer a better waterproofness than traditional watches. They are equipped with a graduated rotative bezel in order to calculate diving time and they also feature a better luminescence.
The central second is the central hand of the dial which divides the minute into 60 units.