The Billionaire III represents Jacob & Co.'s ultimate haute joaillerie timepiece, synthesizing founder Jacob Arabo's lifelong diamond passion with horological complexity through entirely diamond-set architecture housing skeletonized manual-wind tourbillon. The reference BL115.30.BD.AA.A30BD executes this vision in white diamonds: white gold case and bracelet set with 656 emerald-cut white diamonds totaling 128 carats, skeleton movement set with 57 baguette-cut diamonds, limited to 18 pieces worldwide. Billionaire is born from the profound love Jacob Arabo has for diamonds—of all gems, diamonds hold special place in his creative heart and mind. Since earliest days as jeweler, he developed passion for perfection, for the most lavish, large, white and pure diamonds. Since early days of Jacob & Co., Jacob Arabo dreamt about culminating creation where diamonds and watchmaking would peak together. The bar for the 656 emerald-cut diamonds is set extremely high: their intense whiteness, their cream-of-the-crop purity, their individual size, and the fact that the Billionaire III is being edited in limited pieces is testament to level of expertise, dedication and exclusivity that goes into each timepiece. The watch appeals to high jewelry collectors prioritizing gemstones over complications, Jacob & Co. devotees documenting Billionaire evolution, diamond connoisseurs appreciating emerald-cut quality demanding exceptional clarity given step-cut faceting's windowed pavilion revealing inclusions, limited edition seekers valuing 18-piece exclusivity, and buyers seeking ultimate diamond-set timepiece where movement exists facilitating gem display rather than complications justifying case existence.
The 54mm x 43mm x 11mm case fabricates entirely from 18k white gold, employing rectangular cushion-shaped construction with rounded corners. The case and bracelet together receive 656 emerald-cut white diamonds totaling 128 carats. The emerald-cut stones employ step-cut faceting—rectangular table, parallel step facets creating hall-of-mirrors effect, truncated corners—originally developed for emeralds whose brittleness required gentle cutting versus brilliant-cut's sharp angles. The step-cut demands exceptionally high clarity as inclusions become visible through large table and windowed pavilion. The diamonds arrange in geometric grid pattern across case top, sides, and bracelet creating continuous glittering surface. White gold construction proves essential: traditional watchmaking materials like brass, German silver, or steel prove too hard for gem-setting process, pressure required for securing stones bending or distorting thin structures permanently. White gold's malleability enables setting while precious metal status coordinates with diamond luxury, polished surfaces creating bright reflective background enhancing diamond brilliance through light return. The crown positions at 3 o'clock. Sapphire crystal covers dial with anti-reflective coating reducing glare, sapphire exhibition caseback reveals Caliber JCAM39 movement architecture. Water resistance extends 30 meters—jewelry watch specification never intended for aquatic exposure, screwed caseback maintaining basic integrity against incidental moisture.
The dial construction abandons traditional concept, instead presenting architectural skeleton displaying Caliber JCAM39 movement components three-dimensionally. The inner ring features emerald-cut white diamonds fabricated from 18k white gold creating luminous chapter ring framing movement visibility. The movement bridges themselves receive 57 baguette-cut white diamonds—rectangular step-cut stones complementing emerald-cuts' geometry, set directly into white gold bridges uniting movement visually with case creating continuous diamond surface. The skeleton architecture displays movement components prominently: barrel visible at 12 o'clock position with openworked construction revealing mainspring coils, wound via crown, storing 72-hour energy. The tourbillon cage positions at 6 o'clock, completing one-minute rotation, regulating escapement within rotating carriage compensating gravitational positional errors, vertically aligned with barrel creating axial symmetry. Intermediate wheels and pinions throughout create mechanical landscape. The bridges employ exceptionally thin construction—rarely has skeleton movement featured supports this delicate. Geometric arrangement mimics diamond facets' angular patterns. White gold material enables both diamond setting and visual coordination with case. Polished surfaces create bright reflections enhancing brilliance. The hands employ Jacob & Co. exclusive skeletonized design, blued steel construction through heat-treatment creating vivid blue oxide layer, faceted profiles catching light, sweeping over inner diamond ring indicating hours and minutes. The overall aesthetic proves maximalist: every visible surface receives diamonds or polishing, no negative space interrupting continuous sparkle, three-dimensional depth through skeleton construction preventing flat appearance despite gem coverage, mechanical components providing textural contrast against smooth diamond surfaces.
Caliber JCAM39 manual-wind tourbillon movement represents manufacture's purpose-built architecture serving extreme gem-setting requirements. The movement comprises 167 components assembled creating functioning timepiece despite structural compromises necessitated by diamond accommodation. Movement measures approximately 40mm x 31.6mm fitting rectangular case shape versus traditional round calibers. Operates at 21,600 vibrations per hour, 3 Hz traditional frequency enabling individual tick audibility. Provides exceptional 72-hour power reserve from single barrel—record-setting autonomy for extensively diamond-set timepiece where weight and friction penalties typically reduce reserve. Large barrel capacity compensates for these challenges. The movement architecture prioritizes transparency: maximum skeletonization removing all non-essential material. Barrel openworked revealing spring coils. Bridges reduced to minimum structural requirements. Wheels visible throughout. Components positioned dial-side near sapphire crystal—barrel at 12 o'clock, tourbillon at 6 o'clock both visible front and back creating focal points. Vertical alignment of barrel and tourbillon establishes axial symmetry. The tourbillon cage rotates one minute completing circuit. Carriage houses balance wheel, escapement, and pallet fork creating self-contained regulating organ. Rotation theoretically averages gravitational positional rate variations, pocket watch heritage complication maintaining relevance in modern wristwatches through visual appeal. The bridges fabricate entirely from 18k white gold—critical material choice enabling diamond setting. Traditional brass, German silver, or steel prove too hard for setting process. Pressure required for securing stones would bend or distort thin bridges permanently, ruining geometry. Gold's malleability accommodates setting while maintaining structural integrity after setting completion. Bridges receive 57 baguette-cut diamonds, rectangular stones creating continuous diamond surface uniting movement visually with case, eliminating traditional movement-case separation. White gold construction enables setting yet presents challenges: softer than traditional materials requiring thicker dimensions compensating for reduced rigidity, heavier than brass increasing inertia requiring stronger mainspring maintaining amplitude. The finishing reflects high jewelry rather than traditional watchmaking standards: polished surfaces throughout with bridges, wheels, and screws all receiving mirror polish creating maximum light reflection enhancing brilliance. Components arranged in geometric patterns creating visual order. Movement proves hand-wound requiring winding to maintain 72-hour reserve. Crown operation smooth despite diamond-adorned case.
The integrated bracelet continues diamond coverage entirely in 18k white gold construction, tapering from case. The 656 emerald-cut white diamonds totaling 128 carats are distributed across both case and bracelet. Stones arranged in geometric grid creating continuous sparkling surface wrapping wrist. Multiple articulated links enable conforming to wrist curvature while maintaining diamond alignment. White gold folding deployant clasp, likely diamond-set maintaining continuous coverage, secure closure preventing accidental opening given watch value and weight. The bracelet weight proves substantial: total watch combining white gold mass plus 128-carat diamond weight creates significant wrist presence announcing luxury. Sizing adjustment requires professional jeweler as diamonds prevent simple link removal. Precision fitting ensures proper diamond alignment and security. Bracelet width matches case dimensions maintaining visual proportion. Tapers slightly toward clasp preventing excessive bulk. Articulation enables flexibility despite rigid appearance.
The Billionaire III BL115.30.BD.AA.A30BD represents Jacob & Co.'s diamond-set zenith: 54mm x 43mm x 11mm rectangular cushion case entirely 18k white gold, white gold case and bracelet set with 656 emerald-cut white diamonds totaling 128 carats, skeleton movement set with 57 baguette-cut diamonds, Caliber JCAM39 skeletonized manual tourbillon (167 components, 72-hour reserve, 21,600 vph, one-minute rotation, vertically-aligned structure, white gold bridges enabling diamond setting), integrated diamond-set bracelet, limited edition 18 pieces worldwide. The watch synthesizes Jacob Arabo's jewelry heritage with watchmaking ambition—timepiece where horology serves gem display, movement exists facilitating diamond presentation, limited production maintaining exclusivity, white diamonds representing purest colorless expression, 128-carat total creating substantial jewelry value independent of movement, geometric emerald and baguette cuts demanding exceptional clarity and size uniformity. The Billionaire III occupies singular position in haute joaillerie horology: unrivaled diamond quantity and quality within functional timepiece, limited edition accessibility, Jacob & Co. establishing category domination through extremity, watch announcing presence through maximum sparkle, celebrating diamonds as ultimate luxury expression, embodying Arabo's lifelong passion culminating in 656-emerald-cut plus 57-baguette-cut diamond wrist sculpture functioning as timekeeper.
