Why is that crucial? If a unidirectional bezel is knocked and accidentally moved with a dive, it may only Show an extended underwater time. Which means the wearer will overestimate in lieu of underestimate immersion time, and in scenarios that need decompression stops, this can be a make-it-or-break-it component that https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/