Why is important? If a unidirectional bezel is knocked and unintentionally moved over a dive, it may only Show a longer underwater time. That means the wearer will overestimate rather than undervalue immersion time, and in circumstances that demand decompression stops, This may be a make-it-or-break-it variable that helps avoid https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/