WatchesAtlas / Watch knowledge
The Watch Encyclopedia
Understand the details that make a watch.
6 terms
Clear filtersInstantaneous rate
A running-rate estimate relating to the conditions and short observation period of a particular measurement.
Performance & measurementIP rating
A classification of protection against specified forms of solid-particle and water ingress, with conditions depending on the rating.
Performance & measurementISO 22810
An international standard addressing water-resistant watches and the test methods used to assess water resistance.
Performance & measurementISO 3159
An international standard concerning wrist chronometers with a spring-balance oscillator and their performance assessment.
Performance & measurementISO 6425
An international standard addressing divers' watches and their specified requirements and test methods.
Performance & measurementIsochronism
The extent to which an oscillator's period remains consistent as its amplitude or energy state changes.