98Set month / dateWarning: Do not use the quick set function for the date between 8:00 p.m. and 2:00 a.m. because there is no assurance that the date will change at midnight after that; it may not change for another 24 hours.Pull the crown into position 2.1Press the crown against the case and simultaneously turn clockwise until it is firmly secured.the chronograph can be used to measure time intervals for up to 12 hours exactly to 1/ 8 second. the time measured can be read using the seconds, minutes and hours counters.Measure time (chronograph)start measuring time using the P1 pusher. the seconds counter is in motion.1to stop measuring time, press the P1 pusher again and read where it stopped.2use the P2 pusher to reset all the counters to zero.3A watch tested to 5 atm (50 m) may be worn while bathing, showering or swimming (such as in a pool). Water resistance is guaranteed only if the crown is screwed in and should be checked once per year.Water resistancethe binding nature of meter data:Do not swim / diveBath, shower, swimswim, snorkelswim, snorkel, diveDeep-sea divingcleaning: to clean the outer surface of the watch, wipe it gently with a microfiber cloth. use a fine toothbrush and a bit of soapy solution to clean the back of the watch and the metal band. Dry using a lint-free towel. Minimize contact between the leather straps and the water. Maintenance: As a mechanical instrument, a watch requires maintenance by an authorized service center about once every four years.Cleaning and maintenancerotate the crown counter-clockwise. set the current month, then the current date.23EnEn30 m (3 atm)50 m (5 atm)100 m (10 atm)200 m (20 atm)300 m (30 atm)