Description

The Audemars Piguet Royal Oak Perpetual Calendar Ultra-Thin Limited Edition Ref. 26586BA.OO.1240BA.99 is a remarkable timepiece that exemplifies the brand's dedication to horological excellence and innovative design. Crafted entirely from 18-carat yellow gold, this ultra-thin watch seamlessly combines aesthetic sophistication with advanced mechanical engineering, making it a coveted piece for discerning collectors.

Overview

Introduced in 2023 as a limited edition of just 88 pieces, the Royal Oak Perpetual Calendar Ultra-Thin stands as one of the world's thinnest perpetual calendar watches. Measuring a mere 6.2 mm in thickness, it houses the selfwinding Caliber 5133, a movement renowned for its slim profile and precision. The watch features a monochromatic design, with both the case and the integrated bracelet crafted from 18-carat yellow gold, complemented by a matching yellow gold-toned dial. 

Design and Craftsmanship

Audemars Piguet's meticulous attention to detail is evident in every aspect of this timepiece. The iconic octagonal bezel, secured by eight hexagonal screws, pays homage to the classic Royal Oak design. The yellow gold-toned dial is adorned with a fine satin-brushed finish, enhancing its luxurious appeal. The perpetual calendar displays—day, date, month, and moon phase—are harmoniously arranged, ensuring both functionality and aesthetic balance. The integrated bracelet, also in 18-carat yellow gold, features Audemars Piguet's signature satin-brushed and polished finishes, providing a seamless and comfortable fit on the wrist. 

Movement and Performance

At the heart of this ultra-thin watch lies the selfwinding Caliber 5133. Operating at a frequency of 19,800 vibrations per hour (2.75 Hz), this movement offers a power reserve of approximately 40 hours. Despite its slender profile, the Caliber 5133 integrates a full perpetual calendar mechanism, accounting for day, date, month, leap year, and moon phases. The movement's exquisite finishing, including Côtes de Genève on the bridges and a skeletonized rotor bearing the "AP" logo, is visible through the sapphire crystal caseback, showcasing the brand's horological mastery. 

Features and Complications

This timepiece boasts a comprehensive perpetual calendar complication, displaying the day of the week, date, month, and moon phase, along with day-and-night and leap-year indicators. These functions are elegantly presented on the dial, ensuring clarity and ease of reading. The watch is water-resistant up to 20 meters, offering a degree of protection against daily wear, though it is advisable to avoid exposure to water to maintain its pristine condition. 

Specifications

Case

• Material: 18-carat yellow gold

• Diameter: 41 mm

• Thickness: 6.2 mm

• Finish: Satin-brushed with polished bevels

Dial

• Color: Yellow gold-toned

• Markers: Applied yellow gold indices

• Hands: Yellow gold with luminescent coating

• Distinctive Elements: Perpetual calendar sub-dials and moon phase display

Bracelet/Strap

• Material: 18-carat yellow gold

• Width: Tapering design for ergonomic comfort

• Clasp Type: AP folding clasp

• Adjustability: Integrated links for a customized fit

Movement

• Caliber: 5133

• Power Reserve: Approximately 40 hours

• Frequency: 19,800 vibrations per hour (2.75 Hz)

• Jewels: 37

The Audemars Piguet Royal Oak Perpetual Calendar Ultra-Thin Limited Edition Ref. 26586BA.OO.1240BA.99 is a testament to the brand's innovative spirit and dedication to haute horology. Its combination of ultra-thin design, intricate complications, and luxurious materials makes it a standout piece for collectors and enthusiasts alike.