Audemars Piguet Royal Oak Perpetual Calendar 26674SG.OO.1320SG.01 – Limited Edition in Sand Gold

The Audemars Piguet Royal Oak Perpetual Calendar Ref. 26674SG.OO.1320SG.01 represents the pinnacle of the Royal Oak lineage - a breathtaking fusion of cutting-edge horology and timeless design. Released for the 150th anniversary and limited to only 150 pieces worldwide, this model debuts Audemars Piguet’s groundbreaking Sand Gold alloy.

Crafted entirely in 18-carat Sand Gold, this watch redefines elegance and innovation. The 41mm case and integrated bracelet exhibit the iconic octagonal geometry of the Royal Oak, complete with satin-brushed surfaces and polished bevels that highlight the alloy’s unique, ever-changing hue. The warmth of Sand Gold strikes a perfect balance — offering both contemporary sophistication and timeless refinement.

The dial, also finished in matching Sand Gold, features Audemars Piguet’s signature “Grande Tapisserie” pattern. Each guilloché square is precisely cut to catch and reflect light in a dynamic way, bringing depth to the monochromatic aesthetic. The subdials are perfectly balanced, displaying the day, date, month, leap year cycle, and astronomical moon phase, while an outer chapter ring indicates the week of the year, emphasizing both function and symmetry.

Slim white gold hands and hour markers with luminescent coating ensure readability, while the sapphire crystal and transparent caseback offer a clear view of the meticulously finished movement inside.

MOVEMENT

At its core, the Royal Oak Perpetual Calendar 26674SG.OO.1320SG.01 is powered by the Audemars Piguet Caliber 5134, a self-winding mechanical movement renowned for its precision and complexity. This ultra-thin caliber, composed of over 370 components, showcases Audemars Piguet’s technical mastery and aesthetic excellence.

Functions: Hours, minutes, day, date, week indication, month, leap year, and astronomical moon phase

Rotor: 22-carat gold openworked oscillating weight

Finishing: Cotes de Geneve, polished bevels, and circular graining throughout

This sophisticated caliber ensures that the perpetual calendar automatically accounts for varying month lengths and leap years, requiring no manual correction until the year 2100. The moon-phase complication, rendered in stunning detail, is accurate to within one day every 122 years.