Orient Cal. F6922 Automatic, Hand-winding, Hacking Movement Case Diameter: 41.5mm without crown.Case Thickness:13mm. Power Reserve: Approximately 40 hours Water Resistant 200m (660ft): in General, Suitable for Professional Marine Activity and Serious Surface Water Sports, but not Diving To change the date, rotate the crown counter clockwise. To change the day, rotate the crown clockwise. If you pull the crown once more, the time can be set by turning the crown clockwise and counter clockwise.