The Patek Philippe reference 5496 is one of the manufacture's most distinctive Annual Calendar models, combining classical Calatrava elegance with one of Patek Philippe's most practical and innovative complications. Introduced in 2011, the 5496 is powered by the automatic Calibre 324 S QA LU 24H, featuring Patek Philippe's patented Annual Calendar, which automatically differentiates between 30 and 31-day months and requires correction only once each year at the end of February. Its beautifully balanced dial is distinguished by a retrograde date display spanning the upper half of the dial, complemented by apertures for the day and month, together with a moon phase and 24-hour indication at 6 o'clock, creating a highly legible and technically sophisticated layout. Produced in white gold and rose gold, with a variety of dial colours throughout its production, the 5496 has become one of Patek Philippe's most admired contemporary Annual Calendar references, celebrated for its elegant proportions, innovative display and seamless combination of everyday practicality with traditional haute horlogerie.