Warranty: 5 YearsAnti-Magnetic: The movement is unaffected by exposure to strong magnetic fields, even those greater than 1.5 tesla (15,000 gauss).Chronometer: Label given to a watch which has undergone precision tests and received a certificate from an official body (COSC).Date: The day of the month, displayed in a window on a watch dial at the 3 or 6 o’clock position, or within a subdial at 9 o'clock.Master Chronometer Certified: Guaranteeing the Swiss industry’s highest standard of precision, performance and magnetic-resistance, as set by the Swiss Federal Institute of Metrology (METAS).Screw-In Crown: Self-locking crown, screwed into the tube of the case, used for highly water resistant divers' watches.Time Zone Function: Allows the hour hand to be easily adjusted to different time zones without stopping the watch.Transparent Caseback: A transparent caseback - frequently made of sapphire - makes it possible to see the movement inside the watch.Small Seconds: A hand on a sub-dial which tracks seconds typically it completes a full rotation in one minute.Tachymeter: A tachymeter watch has a function for measuring speed. It is a chronograph with a graduated dial on which speed can be read in kilometres per hour based on a 1000 metre distance.