The Code 11.59 by Audemars Piguet Starwheel

Audemars Piguet presents its new Code 11.59 by Audemars Piguet Starwheel, a timepiece that combines black ceramic with 18-carat white gold.

Invented in the 17th century, wandering hours are a type of horological complication that display the hours using a system of satellites that gravitate along a minute scale arranged in the form of an arc. This system was rediscovered and reintroduced by Audemars Piguet in 1991.

The Code 11.59 by Audemars Piguet Starwheel

Named the Starwheel, this unusual mechanism equipped many models up until the early 2000s. Today, the Starwheel is making a comeback in the Code 11.59 by Audemars Piguet collection.

Equipped solely with a seconds hand, the Code 11.59 by Audemars Piguet Starwheel indicates the time using three discs that point to a 120-degree scale graduated with 60 minutes.

The new Starwheel is a continuation of the models from the 1990s and is housed in the ultra-contemporary Code 11.59 by Audemars Piguet case, whose architectural lines are enhanced by the wandering time display.

The Code 11.59 by Audemars Piguet Starwheel

The architecture of the case is reinforced by the overlapping of geometric shapes, including a round bezel, caseback and Starwheel discs as well as a rounded octagonal case middle.

Blue aventurine serves as a shimmering backdrop for the three discs that rotate on their own axes, like planets in the tiny universe of the dial. The three slightly domed discs are made of aluminium and are tinted black thanks to a PVD treatment, before being adorned with an opaline sand-blasted finishing touch.

The white wandering hours numerals are then transferred onto the dial. Following the contemporary design, the 120-degree minute sector, which extends in an arc from 10 to 2 o’clock, and the inner bezel, are both black with white minute indications.

This new 41 mm reference plays with materials by combining aventurine with 18-carat white gold and black ceramic. This diversity of materials as well as the refined hand finishing – a signature of the Manufacture, which creates an infinite play of light – underscores the complex design of the Code 11.59 by Audemars Piguet collection. In addition to this, the 18-carat white gold bezel, lugs and caseback contrast with the black case middle and the new black ceramic crown.

Like the gold components, the ceramic case middle is meticulously finished with the iconic interplay of polished bevels and satin-finished surfaces. Furthermore, Audemars Piguet artisans have used their expertise to achieve the perfect alignment between the multiple angular and round surfaces of the case, which is only possible thanks to their manual craftsmanship.

On the dial side, the double-curved sapphire crystal magnifies both the numerous details present in the blue aventurine and the finishing of the various elements, while also bringing increased depth to the dial.

The Code 11.59 by Audemars Piguet Starwheel

On the back of the watch, the sapphire crystal reveals the movement with the 22-carat pink gold oscillating weight dedicated to the collection. This new reference is fitted with a textured black rubber-coated strap and a new pin buckle engraved with the Audemars Piguet logo, instead of the usual AP monogram.

For the very first time, the emblematic Starwheel display is integrated into the Code 11.59 by Audemars Piguet collection with the selfwinding Calibre 4310.

This next-generation hour, minute and seconds movement is directly derived from the Calibre 4309, to which a new module has been added. Combining watchmaking technology, traditional know-how and refined decorations, this movement has a minimum power reserve of 70 hours and is water-resistant to 30 metres.

The Code 11.59 by Audemars Piguet Starwheel

The time display is achieved thanks to a central rotor operating a complete revolution in three hours and on which are fixed three aluminium discs that turn on their own axes.

Each disc has four digits from 1to 12 that take turns in pointing to the arched sector at the top of the dial on which the minute scale is printed. The 18-carat white gold trotteuse is slightly curved at the tip to follow the relief of the discs, indicating the seconds like in a traditional timepiece.

History of Timepieces with Wandering Hours

The wandering hours system can be traced back to the 17th century following a special request from Pope Alexander VII. Suffering from insomnia that was aggravated by the ticking of a clock, he ordered a “night clock” from the Campani brothers who were clockmakers based in Rome. He requested a clock that would be silent and easy to read in the dark.

The Campani brothers presented the Pope with the first wandering hours clock, where the time was read on a semi-circle in an aperture that indicated the quarter hours and was lit from the inside. This night clock was the precursor of the wandering hours system.

From the end of the 17th century, this complication was introduced into pocket watches without backlighting. While the arc-shaped aperture still measured 180 degrees, the minutes were graduated in addition to the quarter hours for greater precision.

In the 19th century, the popularity of the wandering hours complication started to wane. The timekeepers that were produced at this time presented a sector of 120 degrees to facilitate the reading of the time. The quarter hours disappeared along with the small window for the hours, although the display remained mysterious as the mechanism was still hidden.

The 360-degree wandering hours version made an appearance at this time too, although it was gradually replaced by the jumping hour that was to become typical of the Art Deco period during the first half of the 20th century.

In 1989, an Audemars Piguet watchmaker rediscovered the wandering hours system in an article in the Journal Suisse d’horlogerie.

In 1991, after 18 months of development, the Manufacture’s first wandering hours watch was presented (Ref. 25720). Named the “Star Wheel” – probably in reference to the three stars that support the sapphire hour discs fixed on a large central wheel – this watch broke the mystery of its operation by revealing the mechanism.

Between 1991 and 2003, around 30 “Star Wheel” models were produced by the Manufacture in several different collections. These aesthetically creative timepieces varied in design with the arc-shaped aperture present in different lengths and locations, some of which also incorporated gem-setting and open-working.

Today, with the Code 11.59 by Audemars Piguet Starwheel, the Manufacture is reviving this little-known complication as well as paying a highly contemporary tribute to traditional watchmaking.

Technical details

Model: Code 11.59 by Audemars Piguet Starwheel/ 41 mm
Reference 15212NB.OO.A002KB.01

Case
Black ceramic case middle and crown
18-carat white gold bezel, lugs and caseback
Double glare-proofed sapphire crystal
Case diameter: 41 mm
Case thickness: 10.7 mm
Glare-proofed sapphire caseback
Water-resistant to 30 m

Dial
Blue aventurine dial, black opalinealuminiumdiscs,18-carat white gold hands and black inner bezel.

Movement
Self-winding Calibre 4310
Total diameter: 32 mm (14lignes)
Total thickness: 6.05 mm
Number of parts: 261
Number of jewels: 32
Minimum power reserve guaranteed: 70 h
Frequency of balance wheel: 4 Hz (28,800vibrations/hour)

Functions
Hours, minutes and centre seconds

Bracelet
Textured black rubber-coated strap with 18-carat white gold pin buckle