The matte black Unimatic U1-DHB Heritage Diver showcases a classic five-minute index bezel for track time in or out the water and vintage-style, creamy Super-LumiNova® markers for exceptional legibility. Housed in a 40mm stainless steel case and a 41.5mm unidirectional bezel, it is powered by a reliable Japanese Seiko automatic movement. Stainless Steel Case, Brushed Finish Matte Black Quick-release TPU Strap 40MM Case Five-minute index bezel 2.7mm thick ultra double domed sapphire with inner side anti-reflective coating and a matte black dial Super-LumiNova® GL light old radium 300m ≈ 1000ft ≈ 30atm Automatic caliber Seiko NH35A Self-winding/manual winding Includes Unimatic tough case and warranty card with unique ID seal Made in Italy Style U1-DHB