What is the Breitling B01 caliber?

The B01 is Breitling's in-house chronograph movement, introduced in 2009. It uses a column-wheel mechanism with vertical clutch for smooth chronograph start, stop and reset. The movement runs at 28,800 vibrations per hour with a 70-hour power reserve from a single mainspring barrel. COSC chronometer certified, the B01 powers the majority of Breitling chronographs across Navitimer, Chronomat, Avenger, Premier and Top Time families.

What is the difference between Superocean and Avenger?

Both are tool watches, but with different focus. The Superocean line is purpose-built for diving — ceramic unidirectional bezels, screw-down crowns and water resistance from 200m to 2,000m (Superocean Automatic 42 to Superocean 46). The Avenger line is built for broader military and extreme-use scenarios — larger case sizes (45mm-48mm), more pronounced crown guards, chronograph and GMT complications. The Seawolf model bridges both concepts with 3,000m depth rating in a 45mm Avenger case.

What sizes are available across Breitling collections?

The range spans 36mm to 48mm. Chronomat Automatic 36 is the smallest, designed for ladies. Navitimer Automatic 41 and Superocean Automatic 42 cover the mid-range. Avenger Chronograph 44 and Navitimer B01 46 provide large-wrist options. The Super Avenger Chronograph 48 is the largest reference. Most popular men's sizes cluster around 42mm-44mm. Case thickness varies from 10.9mm on time-only Navitimer to 17.1mm on the Super Avenger chronograph.

What is the circular slide rule on the Navitimer?

The slide rule bezel is a rotating logarithmic scale around the dial perimeter that functions as an analog flight computer. Pilots use it to calculate fuel consumption, climb and descent rates, airspeed conversions and multiplication or division. The inner fixed scale and outer rotating scale interact to provide these calculations. Introduced on the original 1952 Navitimer (ref. 806), the slide rule has remained the line's defining feature for over 70 years and distinguishes it from every other pilot's chronograph.

How does the rider tab bezel on the Chronomat work?

The Chronomat's rider tab bezel features four raised tabs at 12, 3, 6 and 9 o'clock positions on a bidirectional rotating bezel. Originally designed in 1984 for the Italian Air Force aerobatic team (Frecce Tricolori), the raised tabs allow pilots wearing gloves to grip and rotate the bezel quickly. The bezel operates bidirectionally for elapsed time tracking. The tab design became Chronomat's signature identifier and separates it visually from the Navitimer's beaded grip bezel.