Why is essential? If a unidirectional bezel is knocked and accidentally moved with a dive, it might only Screen a longer underwater time. That means the wearer will overestimate as opposed to undervalue immersion time, As well as in predicaments that need decompression stops, this can be a make-it-or-crack-it variable https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/