Description

The present reference is the Patek Philippe Cubitus Perpetual Calendar Skeleton ref. 5840P-001, a landmark timepiece that serves as the first Grand Complication within the Cubitus collection. Launched in late 2024, the 5840P represents a definitive moment for the line, resolving the collection’s bold design language through a total integration of geometry, skeletonized mechanics, and modern “sporty-chic” aesthetics.

The case is a sophisticated evolution of the square-shaped, angular concept, crafted in 950 platinum. Measuring 45 mm (from 10 to 4 o’clock) with a remarkably slim profile of only 10 mm, it delivers a commanding presence on the wrist characterized by a reassuring density. The architecture retains the collection’s signature lateral “ears” and vertical satin-brushed surfaces contrasted by polished bevels. In keeping with Patek Philippe’s tradition for platinum models, a single baguette-cut diamond is discreetly set into the bezel at 6 o’clock.

The dial is an intricate, openworked masterclass in depth and legibility. Blue PVD-coated elements feature the collection’s signature horizontal striped motif, which extends seamlessly across the movement’s top plate. The calendar layout remains classical and intuitive: day and 24-hour indication at 9 o’clock, month and leap year at 3 o’clock, and an oversized moon phase and date at 6 o’clock. This moon display is particularly notable, utilizing a single rotating disc with laser-micromachined lunar relief set against a deep blue sky.

The true horological achievement of the 5840P is the Calibre 28-28 Q SQU, a shaped movement designed specifically for the Cubitus case. While many shaped watches rely on round calibres, this square movement with rounded corners fills the entirety of the platinum case, eliminating dead space. Based on the legendary ultra-thin self-winding calibre 240, it retains the 22k gold micro-rotor but introduces a striking monochrome aesthetic. The bridges, plates, and rotor are rhodium-plated, while transparent sapphire jewels are used in place of traditional rubies, resulting in a technical, architectural look punctuated only by heat-blued screws.

Consisting of 313 parts, the movement incorporates the Spiromax® balance spring and Gyromax® balance, operating at a frequency of 3Hz. It provides a power reserve of up to 48 hours and is finished to the exacting standards of the Patek Philippe Seal. The perpetual calendar mechanism utilizes a reliable 48-month cam system to track the calendar accurately until the year 2100.

Departing from the metal bracelets of simpler Cubitus models, the 5840P is fitted with a navy blue composite strap featuring a textile pattern, secured by a patented triple-blade platinum fold-over clasp. This choice reinforces the watch’s modern, technical identity, making it uniquely wearable for a high complication. The Patek Philippe Cubitus 5840P is more than a new reference; it is the conceptual clarification of the Cubitus line, offering a technically solid and visually coherent vision of the manufacture’s future.

Patek Philippe – Bio

Patek Philippe & Co. was founded in 1839, located in Geneva and the Vallée de Joux. It designs and manufactures timepieces and movements, including some of the most complicated mechanical watches. It is considered by many experts and aficionados to be one of the most prestigious watch manufacturers.
In 1868, Patek Philippe made their first wristwatch, which was sold on November 13, 1876 to the Hungarian Countess.
It is the last independent, family-owned Genevan watch manufacture with uninterrupted operating history spanning nearly 180 years.