Annual Calendar Chronograph Rose Gold Blue Dial 42mm

The Patek Philippe Annual Calendar Chronograph ref. 5905R-001 embodies the fusion of mechanical sophistication and refined contemporary design. Crafted from 18ct rose gold, the 42mm case features a polished concave bezel and hollowed case flanks that highlight its elegant profile.
The sunburst blue dial is strikingly balanced, with applied rose gold baton-style hour markers and luminescent accents for optimal readability. The dial displays the annual calendar function across three apertures—day, date, and month—arranged in an arc beneath 12 o’clock, while the 60-minute chronograph counter occupies the 6 o’clock position. A discreet day/night indicator completes the layout, combining utility with aesthetic harmony.
Powering the watch is the self-winding Calibre CH 28-520 QA 24H, an advanced flyback chronograph movement with a column wheel and vertical clutch. It offers a 55-hour power reserve and can be admired through the sapphire crystal caseback, showcasing Patek Philippe’s impeccable finishing.
The 5905R-001 is paired with a shiny dark blue alligator leather strap and secured by an 18ct rose gold prong buckle. Water-resistant to 30 meters, this reference exemplifies Patek Philippe’s mastery in uniting functionality, innovation, and timeless elegance—making it one of the most compelling modern executions of the brand’s annual calendar chronograph complication.