Breitling Navitimer 46 MM Chronograph Stainless Steel Black Dial Black Alligator Strap AB012721/BD09 J3HNQF Stainless steel case, black dial, silver sub-dials, index hour markers with luminous fill. Chronograph/Stopwatch functions: seconds counter, capable of keeping time up to 1/4th of a second. 30 minute sub-dial counter located at the 3 o'clock position. 12 hour counter sub-dial located at the 6 o'clock position. Seconds sub-dial located at the 9 o'clock position. Fitted with a bi-directional turning bezel which control the "Slide Rule" aka "Navigation Computer". The Slide-Rule complication can compute different airborne calculations such as fuel consumption, climbing times and converting miles into nautical miles or kilometers. Date window displayed between the 4 & 5 o'clock position. Lug width 24 mm, buckle width 20 mm. Breitling Caliber 01, beats at 28,800 vph, contains 47 Jewels & has a minimum power reserve of 70 hours.