Perpetual Calendar Openworked “150ᵀᴴ Anniversary”

ROYAL OAK PERPETUAL CALENDAR "150ᵀH ANNIVERSARY" 26585XT – A MATERIAL TRIBUTE TO 150 YEARS

Merging a glorious heritage with futuristic materials, this 150th Anniversary timepiece features a 41mm case crafted from a revolutionary combination of Titanium and BMG (Bulk Metallic Glass). BMG, an amorphous metal alloy known for its ultra-shiny appearance and extreme hardness, provides a scratch-resistant bezel that outshines even ceramic. The intricate interplay of satin-brushed surfaces and polished bevels showcases the manufacturing mastery of Le Brassus, encasing the legendary Calibre 5135 in a shell that represents the final evolution of this ultra-thin architecture.

SAPPHIRE SKELETON DIAL AND ETERNAL MECHANICS

The heart of this masterpiece is the transparent Sapphire (Skeleton style) dial, drawing inspiration from vintage pocket watch ref. 25729. It reveals the complex internal dance of the perpetual calendar mechanism – from the vivid astronomical moon phase to the intricate gearing of the day, date, and month displays. Blue counter surrounds and luminescent white gold "bathtub" hands provide exceptional legibility while enhancing the dial’s stunning 3D architectural depth.

TITANIUM & BMG INTEGRATED BRACELET – THE PINNACLE OF COMFORT AND DURABILITY

Defining the character of this anniversary model is its meticulously crafted integrated bracelet. The primary links, fashioned from ultra-light Titanium, provide unparalleled comfort, while the polished BMG mid-links (studs) offer a mirror-like contrast and superior durability. This fusion of materials results in a multi-tonal aesthetic that radiates contemporary power. Finished with a triple-folding titanium AP clasp, this 150-piece limited edition is not merely a watch; it is a priceless heritage of Haute Horlogerie.

TECHNICAL SPECIFICATIONS

• Movement: Calibre 5135, In-house Selfwinding, 4.5mm thick.
• Functions: Perpetual calendar (day, date, month, moon phase, leap year, week of the year), hours, and minutes.
• Case: Titanium middle with BMG bezel and caseback frame. 41mm diameter, 9.9mm thickness.
• Dial: Openworked sapphire with blue counter surrounds and luminescent white gold hands.
• Bracelet: Integrated titanium bracelet with BMG mid-links and folding AP clasp.
• Water Resistance: 20m.
• Power Specs: 374 parts, 38 jewels, 2.75Hz frequency (19,800 vph), 40-hour power reserve.
• Availability: Limited Edition of 150 pieces