Submariner and Fifty Fathoms deal with this requirement in the same way, using a rotating bezel with a reflector on the top. When users start to enter the water, they will rotate the bezel so that the position marked on the bezel coincides with the position of the minute hand. When in the water, they only need a glance to know how much time has passed.
The first disadvantage of this method is that it does not allow monitoring for more than 60 minutes. However, the current oxygen tank does not allow us to dive for more than this time, so this shortcoming has little effect.
The second disadvantage of this method is that underwater collisions will cause the bezel to rotate, resulting in incorrect timing. This is inevitable, but the brand also deals with it by letting the bezel rotate only counterclockwise. If you accidentally turn the bezel, the user will only get ashore faster without affecting his life.
With this size, we won't accidentally turn the knob when moving underwater, and we don't have to worry about this problem anymore. This function is very simple, but makes the design of the dive watch unique and more functional. More importantly, this shows the creativity of the watch designer.
The first two versions of the dive imitation watches used two different sets of straps. Submariner uses steel wire, which has the advantage of being waterproof and strong when used. In return, the steel wire is not flexible and flexible. At the same time, many people don't like to wear steel watchbands because they are afraid of touching metal surfaces, especially in the cold winter.