Why is that critical? If a unidirectional bezel is knocked and unintentionally moved on a dive, it could possibly only Exhibit a longer underwater time. That means the wearer will overestimate rather then underestimate immersion time, and in situations that involve decompression stops, This may be a make-it-or-crack-it factor that https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/