Steel - Blue An all-time favorite among pilots and aeronautical enthusiasts since 1952, the Navitimer B01 Chronograph 43 mm combines technical mastery and original design. With Manufacture Breitling Caliber 01, a true emblem of reliability and performance, this legendary model stands out with its steel case, black dial with red seconds hand, silver chronograph counters and applied hour markers. Available in steel, steel & gold, red gold as well as other dial colors, its bidirectional ratcheted rotating bezel ensures smooth and easy handling of the famous circular aviation slide rule. TECHNICAL DATA MOVEMENT Caliber Breitling 01 (Manufacture) Movement self-winding mechanical Power reserve approx. 70 hrs Chronograph 1/4th second, 30 minutes, 12 hours Vibration 28,800 v.p.h Jewel 47 jewels Calendar Dial aperture CASE Case Steel, steel & gold, black steel, 18K red gold Caseback Screwed in (sapphire crystal) Water resistance 3 bars Bezel Bidirectional, slide rule Crown Non screw-locked, two gaskets Crystal Cambered sapphire, glareproofed both sides DIMENSIONS Diameter 43.00 mm Thickness 14.22 mm Weight (without strap) 94.00 g. STRAP Lug 22/20 mm Black croco Tang Type AB0121211C1P1