Navitimer B19 Chronograph 43 Perpetual Calendar LB19211A1C1P1

Complimentary express delivery and returns on all new orders (excluding servicing). A perpetual calendar caliber is a mechanical movement that knows how many days each month has, even on leap years. Knowing that February has 29 days on a leap year may just be one single day, but the mechanical complexity behind it is hard to overstate. The perpetual calendar Caliber B19 incorporates an additional set of components programmed to know exactly when that extra day happens within the four-year cycle. To make things more complicated the five calendar indications: day, date, month, moonphase, and leap year, all advance instantaneously from December 31 to January 1.The perpetual calendar complication alone is a remarkable achievement, but what makes the B19 especially ambitious is that this highly complex mechanism shares space with a chronograph. A chronograph is already one of watchmaking’s most demanding complications, operating independently from the standard time and responding to user i...

Source: Breitling website, last updated Mar 2026