Breitling Calibre 25B, officially chronometer-certified by the COSC, self-winding, high-frequency (28,800 vibrations per hour), 38 jewels. 1/8th of a second chronograph, 30-second, 15-minute and 6-hour totalizers. Calendar. Steel. Water-resistant to 100 m. Screw-locked crown. Rotating pinion bezel with variable tachometer (circular slide rule). Cambered sapphire crystal, glare-proofed on both sides. Diameter: 49 mm., Black Velvet dial, Speed bracelet in steel.