Patek Philippe 5205G-013 is a contemporary annual calendar reference crafted in 18k white gold, featuring a 40 mm case with a concave bezel and skeletonized lugs. Its dial is defined by three apertures positioned along the upper section, displaying day, date, and month in a linear configuration for immediate readability. The lower half integrates a moon phase display and 24-hour indicator, providing both aesthetic balance and functional clarity. The watch is powered by the self-winding Caliber 324 S QA LU 24H/206, a movement designed to manage calendar transitions with high mechanical reliability.

This movement operates at 28,800 vibrations per hour and incorporates a Gyromax balance alongside a Spiromax silicon balance spring, improving accuracy and resistance to environmental variation. The annual calendar complication requires adjustment only once per year, automatically accounting for months with 30 and 31 days. Through its sapphire case back, the movement reveals Geneva striping, polished anglage, and a 21k gold rotor. The 5205G-013 combines modern case architecture with advanced calendar engineering, delivering a technically refined timepiece suited for both daily use and long-term collection.

Patek Philippe Annual Calendar Ref. 5205G-013

Model: Annual Calendar with Moon Phases
Reference: 5205G-013
Collection: Complications
Case Material: 18K white gold
Case Diameter: 40 mm
Case Thickness: 11.36 mm
Case Construction: Polished case with recessed flanks, skeletonized lugs and concave bezel
Case Back: Sapphire-crystal display back
Water Resistance: 30 m

Dial: Blue sunburst with black-gradient rim, applied faceted white-gold baton-style hour markers and faceted white-gold Dauphine-style hands with white luminescent coating. Day, date and month are displayed through three apertures arranged along an arc; the 24-hour indication and moon phases are positioned at 6 o’clock.

Movement: Patek Philippe Calibre 26-330 S QA LU 24H
Movement Type: Self-winding mechanical
Movement Diameter: 32.6 mm
Movement Thickness: 5.8 mm
Number of Components: 339
Number of Jewels: 34
Power Reserve: 35–45 hours
Winding Rotor: 21K gold central rotor
Balance: Gyromax®
Balance Spring: Spiromax®
Frequency: 28,800 semi-oscillations/hour (4 Hz)
Quality Seal: Patek Philippe Seal

Functions: Annual calendar, day, date, month, moon phases, 24-hour indication and central seconds. The Annual Calendar mechanism automatically accounts for months containing 30 or 31 days and requires one correction per year, at the end of February. Patek Philippe states that the mechanism was invented and patented in 1996.

Strap: Hand-stitched shiny black alligator leather with square scales
Buckle: White-gold prong buckle

Alternative References & Configurations

The 5205 family has been produced in several documented configurations. The earlier references used Calibre 324 S QA LU 24H/206, while the later 5205G-013 and 5205R-011 use the newer Calibre 26-330 S QA LU 24H.

* 5205G-001 — 18K white gold; two-tone rhodium/silvery-gray dial; black alligator strap; Calibre 324 S QA LU 24H/206.
* 5205G-010 — 18K white gold; two-tone matte-black/slate-gray dial; black alligator strap; Calibre 324 S QA LU 24H/206.
* 5205G-013 — 18K white gold; blue sunburst dial with black-gradient rim; black alligator strap; Calibre 26-330 S QA LU 24H. Primary configuration above.
* 5205R-001 — 18K rose gold; opaline white dial; dark-brown alligator strap; Calibre 324 S QA LU 24H/206.
* 5205R-010 — 18K rose gold; black lacquered dial; black alligator strap; Calibre 324 S QA LU 24H/206.
* 5205R-011 — 18K rose gold; olive-green sunburst dial with black-gradient rim; hand-patinated two-tone olive-green alligator strap; Calibre 26-330 S QA LU 24H.

Reference distinction: The 5205G-013 is not simply a dial variation of the older 5205G references. It represents a later movement generation, changing from Calibre 324 S QA LU 24H/206 to Calibre 26-330 S QA LU 24H.