watchionary

A count-up bezel, often known as a diving bezel, measures the amount of time that has passed. It features a rating scale ranging from 0 to 60. A count-up bezel is unidirectional to prevent divers from accidentally turning the bezel in the other direction. The majority of count-up bezels must comply with ISO diving watch specifications, which include utilising a unidirectional bezel with a 60-minute scale.