Royal Oak 26240ST.OO.1320ST.03 Chronograph 41mm

Description of the Watch

The Audemars Piguet Royal Oak 26240ST.OO.1320ST.03 Chronograph 41 mm is a majestic celebration of horological history and modern innovation. Crafted to honor the Royal Oak series’ 50th anniversary, this stainless steel masterpiece is both a tribute to tradition and a statement in luxury timekeeping.

Overview

Launched in 2022 to mark five decades of Royal Oak, the 26240ST features a 41 mm stainless steel case, glare-proofed sapphire crystal front and back, and the brand’s signature octagonal bezel with exposed hexagonal screws—hallmarks of the iconic design .

Design and Craftsmanship

The watch’s silver-toned “Grande Tapisserie” dial perfectly harmonizes with the refined proportions of the updated Royal Oak case. It includes three sub-dials with silver-tone counters and applied white-gold hour markers and hands, all coated with luminescent material for nighttime clarity . The stainless steel bracelet, finished with alternating polished and brushed surfaces, seamlessly integrates with the case and closes with an AP folding clasp.

Movement and Performance

Powering this chronograph is Audemars Piguet’s in-house Calibre 4401, a self-winding automatic movement featuring a column-wheel flyback chronograph. Running at 28,800 vph with 40 jewels and offering approximately 70 hours of power reserve, it showcases advanced engineering and reliability.

Features and Complications

Beyond its chronograph function, the watch offers a flyback mechanism, small seconds, and date display near the dial edge. Water-resistant to 50 m and with both crown and pushers securely screwed down, it balances sporty utility with sophistication.

Specifications

Case

• Material: Stainless steel

• Diameter: 41 mm

• Thickness: ~12 mm

• Crystal: Glare-proof sapphire, front and back

Dial

• Color: Silver-toned Grande Tapisserie

• Markers: Applied white-gold baton indices with luminescence

• Hands: White-gold Royal Oak hands, lumed

• Sub-dials: Chronograph counters at 3, 6, and 9 o’clock; date window near dial edge

Bracelet/Strap

• Material: Stainless steel with polished and brushed links

• Clasp: AP folding clasp ensures secure and comfortable wear

Movement

• Caliber: Audemars Piguet 4401

• Type: Automatic with column-wheel, flyback chronograph

• Frequency: 28,800 vph (4 Hz)

• Power Reserve: ~70 hours

• Jewels: 40