Audemars Piguet Royal Oak Perpetual Calendar Openworked 26585CE.OO.1225CE.01 2020 Black Ceramic 41mm Watch

Audemars Piguet Royal Oak 26585CE – Black Ceramic Perpetual Calendar
Basic Information

Movement and Caliber

Case

Dial

Bracelet / Clasp

Functions

• Hours and minutes

• Perpetual calendar

• Day, date, and month

• Leap-year indicator

• Week indicator

• Astronomical moon phase

• Automatic winding

Included Accessories

 

Audemars Piguet Royal Oak 26585CE – Black Ceramic Perpetual Calendar

The Audemars Piguet Royal Oak 26585CE is an exceptional expression of contemporary Swiss haute horlogerie, combining advanced mechanical complications with the unmistakable design of the Royal Oak collection.

Featuring a 41mm black ceramic case, an intricate openworked sapphire dial, and an integrated black ceramic bracelet, this remarkable timepiece balances technical sophistication with modern luxury.

Powered by the automatic caliber 5135, the watch incorporates a perpetual calendar, astronomical moon-phase display, and comprehensive calendar indications.

This particular example dates to 2020 and is presented in very good pre-owned condition, complete with original box and papers.

The Heritage of the Royal Oak

Introduced in 1972, the Royal Oak revolutionized luxury watchmaking with its distinctive octagonal bezel, exposed screws, and integrated bracelet design.

Created by legendary watch designer Gérald Genta, the collection established a new approach to luxury sports watches.

The Audemars Piguet Royal Oak 26585CE builds upon this heritage by combining the collection’s recognizable architecture with an intricate perpetual calendar and contemporary black ceramic construction.

Its openworked design highlights the technical expertise that has made Audemars Piguet one of Switzerland’s most respected watch manufacturers.

Exceptional 41mm Black Ceramic Case

The Royal Oak Perpetual Calendar Openworked features a 41mm case crafted from black ceramic.

Ceramic is valued for its hardness, resistance to many everyday scratches, and distinctive appearance.

The material gives the watch a contemporary character while preserving the Royal Oak’s iconic geometric design.

Its octagonal bezel frames the intricate openworked dial, creating a striking contrast between the dark case and exposed mechanical components.

The matching ceramic bracelet completes the watch’s cohesive monochromatic appearance.

Intricate Openworked Sapphire Dial

One of the defining features of the Audemars Piguet Royal Oak 26585CE is its sophisticated openworked sapphire dial.

Unlike a conventional solid dial, the transparent construction reveals the complex mechanical architecture beneath.

Smoked sapphire counter zones organize the perpetual calendar indications while maintaining the watch’s distinctive transparent appearance.

Applied pink gold hour markers with luminescent coating introduce warmth and contrast against the black ceramic surroundings.

The combination creates an elegant balance between mechanical complexity and visual refinement.

Automatic Caliber 5135

At the heart of this Royal Oak is the automatic Audemars Piguet caliber 5135.

This sophisticated mechanical movement powers the perpetual calendar functions while delivering approximately 40 hours of power reserve.

Its self-winding system uses the natural movement of the wearer’s wrist to replenish the mainspring.

The openworked construction reveals the intricate arrangement of mechanical components, offering a fascinating view of traditional Swiss watchmaking.

Caliber 5135 combines advanced calendar engineering with the craftsmanship associated with Audemars Piguet’s complicated timepieces.

Advanced Perpetual Calendar Complication

The Audemars Piguet Royal Oak 26585CE incorporates one of the most prestigious complications in mechanical watchmaking: the perpetual calendar.

Unlike a conventional date mechanism, a perpetual calendar accounts for the varying lengths of months and the leap-year cycle.

When correctly adjusted and kept running, it automatically distinguishes between months containing 28, 30, or 31 days, including February 29 during leap years.

Under the Gregorian calendar, conventional perpetual calendars generally require correction in 2100, which is not a leap year.

This sophisticated mechanism demonstrates the precision and ingenuity of traditional haute horlogerie.

Astronomical Moon-Phase Display

The watch incorporates an astronomical moon-phase indication that displays the changing phases of the lunar cycle.

This complication adds an elegant astronomical dimension to the perpetual calendar.

Its mechanically driven display reflects the historical relationship between watchmaking, astronomy, and calendar measurement.

Within the openworked dial, the moon-phase indication contributes to the visual richness of the watch while complementing its extensive calendar functionality.

Comprehensive Calendar Functions

The Audemars Piguet Royal Oak 26585CE provides a wide range of calendar indications.

These include the day of the week, numerical date, month, leap-year cycle, and week number.

The smoked sapphire counters help organize the displays while allowing the intricate movement architecture to remain visible.

Despite its mechanical complexity, the watch retains the distinctive design identity of the Royal Oak collection.

Its combination of technical functionality and visual sophistication makes it an impressive example of contemporary complicated watchmaking.

Integrated Black Ceramic Bracelet

The Audemars Piguet Royal Oak 26585CE features an integrated black ceramic bracelet that continues the iconic geometry of the case.

The bracelet’s design creates a seamless relationship between the watch head and bracelet, preserving one of the Royal Oak’s most recognizable characteristics.

The black ceramic construction of the Audemars Piguet Royal Oak 26585CE reinforces the watch’s contemporary appearance.

A titanium AP folding clasp provides a secure fastening mechanism while complementing the bracelet’s integrated design.

The combination of ceramic and titanium demonstrates the use of advanced materials in modern luxury watchmaking.

A Distinctive Openworked Royal Oak

The Royal Oak Perpetual Calendar Openworked stands apart through its combination of dark ceramic construction and intricate mechanical transparency.

The black ceramic case and bracelet create a sophisticated foundation for the exposed movement.

Pink gold hour markers introduce subtle contrast, while the smoked sapphire counters add depth to the dial.

The result is a distinctive timepiece that combines architectural design with mechanical artistry.

For collectors seeking a Royal Oak with advanced complications and an unconventional aesthetic, this reference offers an exceptional interpretation of the collection.

2020 Example in Very Good Condition

This particular Audemars Piguet Royal Oak 26585CE was produced in 2020 and is presented in very good pre-owned condition.

The watch shows minor signs of wear consistent with careful previous ownership.

Its black ceramic case, integrated bracelet, and openworked dial preserve the distinctive appearance of the reference.

The timepiece is accompanied by its original Audemars Piguet box, warranty card, booklets, and papers.

Discover the Audemars Piguet Royal Oak 26585CE

The Audemars Piguet Royal Oak 26585CE represents an extraordinary combination of contemporary material innovation and traditional Swiss mechanical craftsmanship.

Its 41mm black ceramic case, openworked sapphire dial, automatic caliber 5135, and integrated ceramic bracelet create a sophisticated interpretation of the iconic Royal Oak.

Featuring a perpetual calendar, astronomical moon phase, and comprehensive calendar indications, this 2020 example offers an impressive combination of technical achievement and distinctive luxury design.

Presented in very good pre-owned condition with original box and papers, it is a compelling addition to a collection of exceptional Audemars Piguet timepieces.