Swiss Army Professional Ground Force Men's Watch

Swiss automatic mechanical movement timepiece Stainless steel and titanium watch case Swiss Army men's watch with black rubber strap Protected screw-down crown Black dial Date display Luminous hands Arabic numerals Scratch-resistant synthetic sapphire crystal Water resistant to 100 meters (10 ATM, 330 feet) Case dimensions: 41 mm wide x 11 mm thick Strap dimensions: 19 mm wide x 10 inches long All measurements are approximate and may vary slightly from the listed information. Men's watch bands can be sized to fit 7.5-inch to 8.5-inch wrists. Extra links are available through the manufacturer. (We do not provide this service.) This watch is powered by automatic movement which means the winding of the spring occurs automatically when the wearer moves his/her arm. However, it is recommended that you manually wind the watch at least once every two weeks. It is also important to adjust the time once a month as automatic movement can gain or lose a few minutes per month.