Purchased used in 2016, but built in 2006, my Breitling Chronometre B-1 was the last of the ‘B-1’ model range. The later model B-1s houses certified chronometer quartz (cal. B78) which means a max time variation of 0.07 seconds per day, which is around 2 seconds a month! The movement is also thermo-compensated, regulating the…

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