Description The Master Carbon SEAL Automatic features a CARBONOX™+ case, a ground-breaking material that is light, durable, hypoallergenic, weatherproof, and shock and scratch resistant. Combining all the details for which Luminox is famous - toughness, luminosity, extreme water resistant, legibility, plus an automatic movement that also features a day and date window. To show off the mechanical movement powering this timepiece, Luminox has added an exhibition case back to show off the movement and automatic rotor. A steely grey Cut-To-Fit rubber strap complements the black dial with grey details.   Details: Origin: Swiss Made Always Visible: Constant glow for up to 25 years in any light condition Size/Diameter: 45 mm Water Resistance: 200 meters, 20 ATM, 660 feet, individually tested Movement: Swiss Automatic – SELLITA SW 220-1 Case: CARBONOX™+ Bezel: 316L stainless steel, unidirectional rotating bezel, at 12h fitted with a protected colored light tube with sapphire crystal Case back: 316L stainless steel, screw in Crystal: Sapphire, anti-reflective coated Crown: 316L stainless steel screw down Height: 14 mm Weight 110gram (3875, 3863), 125gram (3869)