Watch info of the day:

A "chronometer" is a watch tested and certified to certain precision standards, for example, through the C.O.S.C. (Contrôle Officiel Suisse des Chronomètres), the official Swiss Chronometre testing institute.

A "chronograph" is a watch with both timekeeping and stopwatch functions, which will typically have 2 or 3 sub-dials to enable this. A typical chronograph is the latest version of the Breitling Chronomat.