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Style: Simple Shape: Round Finish: Brand new Popular element: Hollow Movement type: Mechanical movement - Automatic mechanical movement Strap material: stainless steel Dial thickness: 16mm or more Dial diameter: 50mm Case material: alloy Additional features: Calendar week display month display Display mode: pointer type Table bottom type: revealing Buckle style: single fold buckle Waterproof depth: 0ATM Watch mirror material: ordinary glass mirror Movement origin: China Automatic mechanical watch, to rely on the swing of the arm to run! The first time to use the watch, to wind 10-15 turns (do not exceed 20 turns)! The middle button, turn clockwise 10-15 turns (that is, twist up) and bring enough for eight hours a day! If you don't wear it for eight hours, the watch may stop moving and need to be rewound!