Why is always that important? If a unidirectional bezel is knocked and unintentionally moved on the dive, it might only Exhibit a longer underwater time. Meaning the wearer will overestimate in lieu of underestimate immersion time, As well as in predicaments that need decompression stops, This may be a make-it-or-break-it https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/