The 41mm Steel Navigator Automatic (SSNAV AUTO) is part of the Steel Navigator squadron that features a self-winding automatic movement. Equipped with Swiss-precision and reliability, the SSNAV Auto was developed for pilots and everyday adventurers.The watch represents the continued lineage of Marathons original Steel Navigator, developed in partnership with the Kelly Air Force Base in 1986.Includes Ballistic Nylon strap. Silver-tone stainless steel case with a two-tone nylon strap. Bi-directional rotating silver-tone stainless steel bezel. Black dial with Arabic numeral hour markers. Dial Type: Analog. Luminescent hands and markers. Automatic movement. Scratch resistant sapphire crystal. Screw down crown. Solid case back. Round case shape, case size: 41 mm. Band width: 20 mm, band length: 11 inches. Buckle clasp. Water resistant at 100 meters / 330 feet. Ssnav Automatic Sterile Series. Fashion watch style. Marathon Ssnav Automatic Sterile Black Dial Unisex Watch WW194029SS-0801-KIT.