The Code 11.59 collection debuted at SIHH 2019 provoking immediate polarization: critics dismissed the round case as betrayal of Royal Oak's octagonal identity, defenders praised willingness exploring aesthetics beyond Genta's 1972 masterwork. The name itself sparked controversy—"Code 11.59" referencing hours/minutes positions on dial face (11:59 suggesting final moment before transformation), perceived as pretentious marketing rather than genuine historical connection. Yet beneath divisive styling existed serious watchmaking: the case construction employing 18k gold octagonal middle caseband visible only from profile (invisible from direct dial view), double-curved sapphire crystals requiring complex manufacturing, lugs flowing organically from bezel rather than bolted afterthought. Audemars Piguet committed substantial development resources validating Code 11.59 as legitimate haute horlogerie platform rather than Royal Oak alternative—complications including perpetual calendars, chronographs, tourbillons proving technical credibility.
The Selfwinding Flying Tourbillon premiered 2019 launch carrying Caliber 2950—new automatic tourbillon movement designed specifically for Code 11.59 rather than adapted from existing caliber. Early versions employed monochromatic precious metal cases (white gold, rose gold) with solid color dials (silver, grey) establishing minimalist aesthetic. The 2022 introduction of black onyx dial variant (26396NB.OO.D002KB.01) marked aesthetic evolution: semi-precious stone dial creating jewelry-watch character, black ceramic case middle contrasting white gold bezel/lugs, pink gold accents (hands, hour markers, tourbillon frame) warming monochrome palette. The 2026 beige dial reference 26396NB.OO.D002CR.01 represents further refinement: ivory-toned dial replacing black onyx, hand-engraved guilloché pattern creating texture, warmer aesthetic compared to onyx's stark minimalism.
The 41mm x 11.8mm case maintains Code 11.59's signature construction: 18k white gold bezel and lugs, black ceramic case middle, 18k white gold caseback. The case architecture employs multi-material approach rarely attempted in watchmaking—most manufacturers choose single material throughout (all steel, all gold, all ceramic) avoiding complications of thermal expansion differentials, galvanic corrosion risks, aesthetic coherence challenges. Audemars Piguet addresses these through engineered tolerances accommodating material properties: ceramic's near-zero thermal expansion versus gold's measurable expansion, ceramic's hardness requiring diamond tooling versus gold's relative softness.
The 18k white gold bezel features polished round profile transitioning to lugs via organic curves—no sharp angles or geometric breaks, instead smooth flowing surfaces requiring extensive hand-polishing maintaining curvature consistency. The lugs extend from bezel integrating seamlessly with case middle, their inner surfaces receiving satin brushing while outer edges show polished bevels. The finishing alternates between techniques: brushed surfaces creating matte texture, polished chamfers (beveled edges) catching light, sharp transitions between surfaces demonstrating hand-finishing precision.
The black ceramic case middle spans approximately 6mm height comprising case's vertical dimension between bezel and caseback. Ceramic's manufacturing requires sintering powdered zirconium oxide at extreme temperatures (1,450°C) shrinking material approximately 25% as particles fuse—requiring precise pre-sintered dimension calculations. The ceramic receives faceted finishing: multiple flat surfaces separated by polished bevels creating architectural geometry visible only from profile view. From direct dial perspective, only white gold bezel visible—ceramic case middle hidden beneath bezel overhang creating visual illusion of monochromatic precious metal case.
The ceramic crown at 3 o'clock integrates white gold crown chip (Audemars Piguet logo) operating time-setting and manual-winding functions. The crown's ceramic construction maintains material consistency with case middle while white gold chip provides tactile grip and brand identification. Water resistance extends 20 meters—adequate for handwashing and rain exposure though insufficient for swimming, reflecting tourbillon complication's delicate nature discouraging aquatic activities.
The sapphire caseback reveals Caliber 2950 secured by white gold caseback ring. The sapphire employs double-curved profile matching dial-side crystal's geometry, anti-reflective coating applied improving movement visibility. The caseback displays openworked rotor, movement bridges with hand-finishing, inscription confirming caliber number.
The beige dial—Audemars Piguet describes as "ivory-toned"—features hand-engraved guilloché pattern created by master guillocheur Yann von Kaenel who developed Code 11.59's signature concentric circle motif. The guilloché employs stamped rather than cut technique: patterned die pressing into dial blank creating relief pattern, then PVD coating applied achieving beige/ivory coloration. The concentric circles radiate from dial center creating visual depth as light strikes different angles—some circles appearing lighter, others darker depending on viewing perspective.
The beige inner bezel employs azuré finish—radial guilloché pattern emanating from center creating sunburst effect. This inner bezel occupies annular ring between central guilloché dial and outer black perimeter, providing color transition from warm beige center to black outer ring. The black outer perimeter displays minute divisions in white printing, visually connecting to black ceramic case middle creating coherent black accent throughout case/dial composition.
Applied 18k pink gold hour markers—rectangular batons at each hour position except 6 o'clock (occupied by tourbillon aperture)—contrast against beige dial. The pink gold introduces warm metallic tone differentiating markers from white gold case, creating subtle color harmony with beige dial's warm ivory hue. The hour markers receive luminescent filling enabling nighttime legibility.
Pink gold openworked hands—skeleton construction revealing dial beneath hand silhouettes—sweep above dial indicating hours and minutes. The hands receive luminescent material along edges ensuring visibility across lighting conditions. The openworked design prevents hands obscuring dial's guilloché pattern, maintaining visual transparency.
The flying tourbillon aperture dominates 6 o'clock position: large opening revealing three-arm tourbillon cage rotating once per minute. The aperture surrounds with pink gold ring creating decorative frame, matching pink gold used for hour markers and hands. The tourbillon cage fabricates from titanium achieving lightweight construction (reducing energy requirements for rotation), three arms extending from central hub supporting balance wheel at cage periphery.
Audemars Piguet's Caliber 2950 debuted 2018 (initially in Royal Oak applications) as manufacture's first automatic flying tourbillon movement. The movement measures 31.5mm diameter x 6.2mm thickness operating at 21,600 vibrations per hour (3 Hz—slower than typical 4 Hz enabling easier tourbillon observation) with 27 jewels throughout 270 components. The architecture delivers minimum 65-hour power reserve (actual reserve typically extends 68-70 hours) from single barrel.
The flying tourbillon construction eliminates upper bridge traditional tourbillons require: standard tourbillon cages mount between lower plate and upper bridge creating sandwich construction, flying tourbillon cantilevers from lower plate only. This eliminates upper bridge obstruction enabling unimpeded dial-side view of rotating cage. The engineering challenge: maintaining cage rigidity without upper support, requiring reinforced lower mounting and precisely balanced cage preventing wobble during rotation.
The automatic winding employs central openworked rotor visible through caseback, 22k gold rotor segment providing winding mass while openworked arms reveal movement beneath. The rotor oscillates bidirectionally during wrist movement, pawl mechanism converting oscillation to unidirectional barrel winding. The winding efficiency proves sufficient that moderate daily wear maintains full reserve despite tourbillon's relatively high energy consumption.
Movement finishing meets haute horlogerie standards: hand-beveled edges on bridges (anglage), polished bevels catching light, Côtes de Genève striping creating parallel wave pattern, circular graining (perlage) on base plate, polished screw heads, black polishing on steel components. The finishing remains entirely visible through sapphire caseback enabling appreciation of traditional decorative techniques.
The reference 26396NB.OO.D002CR.01 occupies evolved position within Code 11.59 Selfwinding Flying Tourbillon lineage: beige guilloché dial creating warmer aesthetic versus black onyx's dramatic minimalism, white gold/black ceramic case maintaining two-tone material contrast, pink gold accents harmonizing with beige dial's ivory warmth. The watch appeals to collectors who appreciate Code 11.59's unconventional design language—those who view round case as legitimate expression of Audemars Piguet's design heritage rather than Royal Oak betrayal, value hand-engraved guilloché craftsmanship, and embrace flying tourbillon as legitimate complication rather than decorative novelty.
The tourbillon complication itself—originally invented by Abraham-Louis Breguet 1795 compensating for gravitational effects on pocket watch accuracy when carried vertically in waistcoat—proves theoretically unnecessary in wristwatches experiencing constant positional changes. Yet contemporary tourbillons serve aesthetic purpose: the rotating cage creates kinetic sculpture, demonstrating watchmaking mastery, justifying haute horlogerie positioning. The flying construction enhances visual drama by eliminating upper bridge obstruction, enabling full appreciation of three-arm titanium cage rotating through complete revolution every sixty seconds. For collectors, the 26396NB represents Audemars Piguet confidently pursuing Code 11.59 identity distinct from Royal Oak—proving round case luxury watches deserve manufacture development resources alongside octagonal icon that defined brand identity for half-century.
