Luminox P–38 LIGHTNING®, 42 mm, Pilot Watch. The timeless P-38 LIGHTNING® with a 42mm black dial and sapphire crystal comes with a mesh bracelet with Luminox signature buckle. The second timezone makes it a must-have for any worldwide traveler. Black dial, stainless steel with a mesh band. Case diameter 42 millimeters. Origin: Swiss Made Always visible: Constant glow for up to 25 years Function: GMT (2nd time zone) Movement: Swiss quartz Caliber: RONDA 515.24H Water resistance: 100 meters / 330 feet / 10 ATM Case diameter: 42 mm Bezel: Fixed Case material: 316L Stainless steel Case back: 316L Stainless steel screw in see through Crystal / glass material: Sapphire crystal, anti-reflective coating Crown: Screw in Strap / bracelet: 316L Stainless steel Strap / bracelet buckle: 316L Stainless steel Lug width: 22 mm Case height: 14 mm Weight: 135 g Approximate battery life span: 50 months