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.