Audemars Piguet 26586BA.OO.1240BA.99 Royal Oak Perpetual Calendar Ultra-Thin Champagne Dial Watch

Audemars Piguet Royal Oak Perpetual Calendar Ultra-Thin – Ref. 26586BA.OO.1240BA.99

The Audemars Piguet Royal Oak Perpetual Calendar Ultra-Thin (Ref. 26586BA.OO.1240BA.99) is a remarkable example of ultra-thin haute horlogerie, combining timeless design and engineering mastery. Released as a limited edition in 2023, this 41 mm watch is crafted entirely in 18-carat yellow gold, offering a monochromatic and highly refined aesthetic. With only 88 pieces produced globally, this timepiece represents the pinnacle of AP’s craftsmanship and exclusivity.

Case and Bracelet

• Material: Solid 18k yellow gold, including the iconic octagonal bezel and integrated bracelet with folding AP clasp.
• Dimensions: 41 mm diameter and an extraordinary 6.2 mm thickness, positioning it among the thinnest perpetual calendar wristwatches ever created.
• Water Resistance: 20 meters, suitable for daily elegance with care.
• Crystal: Anti-reflective sapphire on both the front and back provides clear visibility and protection.

Dial Design

This limited edition features a champagne-toned dial that matches the yellow gold of the case and bracelet. The subdials for day, date, month, moon phase, and leap year are harmoniously integrated in the same tone, giving the dial a seamless, minimalist appearance. The applied yellow-gold hour markers and Royal Oak hands include luminescent coating for improved legibility.

Movement and Complications

• Calibre 5133: An ultra-thin, automatic perpetual calendar movement that powers all calendar functions including day, date, month, moon phase, leap year, and day/night indication. It operates at 19,800 vibrations per hour (2.75 Hz), with a power reserve of approximately 40 hours.
• Technical Data: The movement is made up of 374 components and 38 jewels, engineered within a compact 32 mm x 2.9 mm format to support the ultra-slim design.

Exclusive Features

The Ref. 26586BA.OO.1240BA.99 is one of the most elegant interpretations of the Royal Oak to date. The full-gold construction combined with a tone-on-tone champagne dial creates a unified and radiant aesthetic. Its ultra-thin 6.2 mm profile showcases Audemars Piguet’s unmatched ability to compress mechanical complexity into wearable elegance. The open sapphire caseback reveals the finely finished movement and rotor, highlighting the watch’s mechanical artistry.

Limited Edition Significance

Limited to only 88 pieces, this watch holds strong appeal for collectors seeking exclusivity and technical excellence. It also marks the end of an era for Calibre 5133, one of the final iterations of AP’s celebrated ultra-thin perpetual calendar movements. Its rare combination of heritage, craftsmanship, and precious materials ensures long-term desirability and investment value.

Technical Specifications

• Reference: 26586BA.OO.1240BA.99
• Case: 18k yellow gold, 41 mm diameter, 6.2 mm thickness
• Dial: Champagne tone, matching subdials, yellow-gold hands and markers with luminescence
• Movement: Calibre 5133, automatic, 374 parts, 38 jewels, 40-hour power reserve
• Complications: Perpetual calendar with day, date, month, moon phase, leap year, and day/night indicators
• Water Resistance: 20 meters
• Edition: Limited to 88 pieces

Conclusion 26586BA.OO.1240BA.99

The Audemars Piguet Royal Oak Perpetual Calendar Ultra-Thin Ref. 26586BA.OO.1240BA.99 is a masterwork of engineering and design. Its blend of slimness, complexity, and precious metal construction makes it one of the most distinguished perpetual calendars ever made. For connoisseurs of rare and refined horology, this timepiece stands as a lasting symbol of innovation, heritage, and exclusivity.