Model 6401 from Luminox' EVO F-117 Nighthawk collection features solid stainless steel construction with black PVD plating, a nearly scratchproof sapphire crystal, Swiss quartz movement with a 10-year lithium battery, solid link bracelet, water resistance to 200 meters and a unidirectional ratcheting bezel. Model 6402 also features the Luminox tritium illumination system.