Breitling Chronomat B01 Chronograph 42

Breitling's Chronomat B01 Chronograph 42, reference AB0158101L1S1, is a chronograph in a 42 mm steel case. The case measures 13.77 mm thick, and the crown is screw-locked with two gaskets. A sapphire crystal covers the green dial, which carries a date aperture and small seconds subdial. Inside is the self-winding Breitling 01 manufacture calibre, chronometer-certified, with a 70-hour power reserve. The chronograph function times to a quarter of a second across 30-minute and 12-hour counters, and a sapphire caseback shows the movement. A green rubber strap closes on a steel folding clasp. The screw-locked crown helps hold the water resistance to 200 metres.