Patek Philippe Watches & Wonders 2026: Nautilus at Fifty, and the Cubitus Perpetual Calendar

When the Nautilus was introduced in 1976, it represented a genuine departure from what was expected of Patek Philippe. Designed by Gérald Genta and executed in steel, with a case form derived from the locking mechanism of a ship's porthole, it was a watch that set its own terms. Fifty years on, Patek Philippe marks the anniversary with four limited editions that return to first principles, and a fifth watch that demonstrates how the sporty-elegant spirit of the collection continues to evolve.

The four Nautilus anniversary models share a deliberate restraint: hours and minutes only, no date, and the ultra-thin caliber 240 at the centre of each wristwatch. The fifth piece, the Cubitus Perpetual Calendar, joins the anniversary group not as a Nautilus but as a watch that shares its design DNA — bold, modern, and uncompromising in its relationship between case and movement.

The two Jumbo Nautilus references are the centrepiece of the anniversary, and their restraint is deliberate. Both wear a white gold case measuring 41mm in diameter with a profile of 6.9mm, a slenderness made possible by the caliber 240 at their core. That movement, just 2.53mm in height and comprising 152 parts, was introduced in 1977, a year after the Nautilus itself, and its reappearance here carries a clear sense of continuity. Displays are limited to hours and minutes, a decision that places full weight on the sunburst blue dial and the horizontal relief embossing that has defined the Nautilus since its first reference. The 22K gold mini-rotor on each model is engraved with the inscription "50 1976–2026", visible through the sapphire crystal case back.

The two references diverge in their finishing. Reference 5810/1G-001 carries plain white gold baton hour markers and is worn on an integrated white gold bracelet with a fold-over clasp and lockable adjustment system, limited to 2,000 pieces. Reference 5810G-001 replaces those markers with baguette-cut diamonds totalling approximately 0.39 carats, and is mounted on a navy blue composite strap with cream contrasting stitching, secured by a Nautilus fold-over clasp in white gold, limited to 1,000 pieces.

Reference 5610/1P-001 reintroduces the medium-size Nautilus, a format originally established with Reference 3800/1 in the 1980s and last revisited at the collection's 30th anniversary in 2006 with Reference 5800/1A. The case is 950 platinum, measuring 38mm in diameter and maintaining the same 6.9mm profile as the Jumbo models, with the caliber 240's mini-rotor carrying the anniversary engraving. The alternating polished and satin-brushed surfaces on the bezel, case, and bracelet take on a different quality in platinum, and a brilliant-cut diamond is set into the hinge at nine o'clock, placed at that position for the first time on a Nautilus. The dial carries the same sunburst blue finish and horizontal relief embossing as its larger siblings, with white gold baton hour markers and luminescent baton hands. The platinum bracelet is secured by a patented fold-over clasp with a lockable adjustment system. This reference is limited to 2,000 pieces.

The desk watch is the most unexpected model of the anniversary. Reference 958G-001 takes the Nautilus silhouette into a format it has never occupied before, transposing the octagonal bezel, the two-part case construction, and the characteristic polished and satin-brushed finishing into a desk watch measuring 50.65mm in diameter. The movement is the manually wound caliber 31-505 8J PS IRM CI J, introduced in 2025 in the Calatrava 8-Day Reference 5328G-001. Two going barrels connected in series deliver a minimum eight-day power reserve, with a ninth day held in reserve, and the movement incorporates a Pulsomax escapement in Silinvar and a Spiromax balance spring. In addition to hours and minutes, it displays an instantaneous date by hand, an instantaneous day in an aperture, small seconds at six o'clock, and a power reserve indication.

The sunburst blue dial carries baguette-cut diamond hour markers totalling 0.96 carats. On the reverse, a hinged cover houses a sapphire crystal view of the movement and doubles as a stand when open, keeping the watch stable and readable on a surface. A gold ring on the case back is engraved with "50th Anniversary Nautilus 1976–2026 Patek Philippe". This reference is limited to 100 pieces. All four anniversary models are delivered in a cork-exterior presentation case, recalling the packaging used for the original 1976 Reference 3700 and the 40th anniversary editions of 2016.

The Cubitus collection, introduced in October 2024, established a new expression of sporty elegance within Patek Philippe's portfolio, and Reference 5840P-001 is its first grand complication. The case is 950 platinum, 45mm in diameter and 10mm in total height, a notably restrained profile for a perpetual calendar. A baguette-cut diamond is set into the bezel at six o'clock, consistent with Patek Philippe's practice on platinum models, the cut chosen to harmonise with the rectilinear geometry of the case.

The movement is the new caliber 28-28 Q SQU, designed from the outset as a square with rounded corners, measuring 28.5 x 28.5mm, so that its shape mirrors the case architecture above it. The movement is skeletonised, with the openworked plates and bridges echoing the horizontal linear motif embossed on the Cubitus dials. A monochrome rhodium-plated finish extends across all movement components, including the 22K gold mini-rotor, with the only colour accents being the heat-blued screws and a hand-engraved Calatrava Cross varnished onto the rotor. Functional jewels throughout are set in clear sapphire rather than the conventional red, except on the lever arms where they remain red for the purposes of precision timing. The movement comprises 313 parts.

The perpetual calendar mechanism, an evolution of the 48-cam system from the caliber 240 Q family, displays the date, day, 24-hour indication, month, leap year, and moon phase across three subsidiary dials. The moon phase display is the first in Patek Philippe's regular collection to use a large-moon mechanism, with a single large-scale moon completing one rotation per lunar cycle of 29.53 days. The openworked dial, with fine laser-cut strips in blue PVD, aligns precisely with the movement beneath, reinforcing the visual continuity between case, dial, and caliber. White gold baton hour markers and hands carry a luminescent coating. The watch is worn on a navy blue Cordura composite strap with cream stitching, secured by a Cubitus fold-over clasp in platinum engraved with the collection name.