Audemars Piguet 26579CE.OO.1225CE.01

Design
Case and Bracelet: Crafted from 41mm black ceramic, featuring an iconic octagonal bezel secured by 8 polished titanium screws. Both the case and integrated ceramic bracelet undergo a satin-brushed finish for a matte texture and enhanced durability. The screw-down crown ensures 100-meter water resistance, balancing athletic functionality with premium aesthetics.
Dial: A blue dial adorned with the classic “Grand Guilloché” pattern, featuring white three-dimensional hour markers and hands (with luminescent coating). It houses multiple complications: a month/leap year indicator at 12 o'clock, at 9 o'clock is the day indicator, at 6 o'clock integrates the moon phase (featuring a starry sky motif) with the brand logo, and at 4:30 is the date display. The outer bezel also incorporates a pulse rate scale, offering rich functionality without appearing cluttered.
Movement and Functions
Powered by the Cal.5134 automatic mechanical movement, comprising 392 components. Operating at a frequency of 21,600 vibrations per hour (3Hz), it offers a 40-hour power reserve and is certified by the Swiss Official Chronometer Testing Institute (COSC).
It boasts perpetual calendar functionality (automatically recognizing common/leap years and month lengths until 2100 without manual adjustment), a moon phase display, and day/date/month indications—a rare high-complexity configuration for a sports watch.