Q
What is the difference between chronograph/chronometer/cosmograph?
What are the differences between the terms Cosmograph, Chronograph, Chronometer, etc. used in Rolex Daytona? I'm so confused.
A
1. Chronograph
Breitling Navitimer / ⓒ Watchmaster
To put it simply, a chronograph can be seen as a watch with a stopwatch function. It features one or two pushers next to the crown and one or more sub-dials to measure how much time has passed. It was mainly developed for the purpose of fields such as automobile racing and aviation.
2. Cosmograph
Rolex Daytona / ⓒ Rolex
Cosmograph is a term created and registered by Rolex in 1953. (For example: oyster, perpetual, etc.) was initially used in watches with moon phase and calendar functions, but is now used in all Daytona chronograph series.
3. Chronometer
Rolex Green Seal / ⓒ Rolex
Chronometer is a term referring to a watch with very precise functions. Only watches that have passed thorough testing and certification by the Swiss Chronometer Testing Council (COSC) can bear the name 'chronometer'. Currently, luxury watch brands that produce Rolex in-house movements have set their own standards higher than COSC and use names such as Superlative Chronometer, which they prove with a green seal.
Sophie
VIVER Content Team