The reason I bought the Breitling Colt quartz was because I wanted a very accurate watch, the Breitling has a calibre/movement that is made by ETA of Switzerland, it is thermally-compensated so it maintains a very high degree of accuracy, ETA state the thermoline calibre to be +/-10 seconds per year. An automatic movement that is COSC (Contrôle Officiel Suisse des Chronomètres) certified can be accurate to within +6/-4 seconds per day.
The Breitling Colt is one of a very few watches that is certified by the Contrôle Officiel Suisse des Chronomètres and each watch is sold with a certificate with the watches serial number marked on the certificate.
I will be checking the watches accuracy regularly with time.gov and Breitling's own time check on their website.
Rob H