"Chronomat B01 42 , MOVEMENT - Caliber - Breitling 01 (Manufacture) . Movement- self-winding mechanical . Power reserve- approx. 70 hrs . Chronograph - 1/4th second chronograph, 30-minute and 12-hour totalizers.. Vibration- 28,800 v.p.h. Jewel- 47 jewels. Calendar Dial aperture . Case material- Stainless Steel . Caseback- Screwed in (sapphire crystal). Water resistance- 200 m (660 ft). Bezel- Unidirectional, ratcheted. Crown- Screw-locked, two gaskets. Crystal - Cambered sapphire, glareproofed both sides . DIMENSIONS : Product Weight (Approx.)- 200.0 g.Watch-head Weight (Approx.)- 3,315,895.0 g. Diameter- 42.0 mm. Thickness- 15.1 mm. Height (upper lug tip to lower lug tip)- 50.5 mm. Lug width (in-between lug)- 22.0 mm .Strap material- Stainless Steel. Strap color- Metal Bracelet . Strap type- Straight. Lug- 22/20 mm .