Why is the fact that significant? If a unidirectional bezel is knocked and unintentionally moved on the dive, it can only Exhibit an extended underwater time. Which means the wearer will overestimate instead of undervalue immersion time, and in cases that need decompression stops, This may be a make-it-or-crack-it factor https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/