Roger Dubuis operates according to different gravitational laws than traditional Swiss watchmaking—founded in 1995 by veteran watchmaker Roger Dubuis (who previously spent 14 years at Patek Philippe), the brand positioned itself immediately as provocateur rather than preservationist. Where Geneva's establishment manufactures pursued discreet elegance and complications executed in precious metals, Roger Dubuis embraced skeletonized movements, architectural case designs, and collaborations with supercars, rock bands, and luxury retailers.
The brand achieved Poinçon de Genève certification for its movements—the stringent Geneva Seal quality standard dating to 1886—while simultaneously producing watches that looked nothing like traditional Geneva haute horlogerie. This DBEX0707 represents collaboration between Roger Dubuis and Harrods, the iconic Knightsbridge department store that established dedicated Fine Watch Room showcasing top manufactures. Limited to eight pieces globally and exclusive to Harrods, the watch employs the Excalibur case architecture—Roger Dubuis's signature design language inspired by King Arthur's legendary sword and the Round Table—executed in grade 5 titanium, paired with skeletonized automatic movement visible through sapphire crystals front and rear.
The extreme limitation (eight pieces) positions this among Roger Dubuis's most exclusive retailer partnerships. The brand typically produces limited editions in runs of 28 pieces (Roger Dubuis's lucky number, with "88" often appearing on tachymeter scales as tribute to the late founder), 88 pieces for more accessible releases, or open production for core Excalibur references. Eight-piece limitations appear exclusively for major retail partnerships or bespoke commissions—Harrods securing single-digit production run demonstrates the department store's negotiating power and Roger Dubuis's willingness to create virtually one-off executions for strategic retail relationships.
The Excalibur case measures approximately 45mm diameter, fabricated entirely from grade 5 titanium—the aerospace-grade Ti-6Al-4V alloy comprising 90% titanium, 6% aluminum, 4% vanadium, offering exceptional strength-to-weight ratio and corrosion resistance. Titanium's density (4.5 g/cm³) creates substantial weight savings versus stainless steel (8.0 g/cm³) or precious metals—complete watch on textile strap weighs perhaps 80-100 grams versus 150-200+ grams for equivalent steel construction.
The Excalibur's signature design language manifests through angular case architecture, notched bezel, and distinctive triple-lug system at 12 and 6 o'clock. The triple lugs—three parallel bars extending from case to accommodate strap attachment—create aggressive visual statement while distributing strap tension across wider surface area. The case finishing employs mixed surfaces: brushed flats creating matte gray appearance, polished bevels providing visual contrast and dimensional definition. Achieving clean transitions between brushed and polished surfaces on titanium requires specialized techniques, as the metal's elasticity resists taking sharp edges cleanly during polishing.
Roger Dubuis powers Excalibur automatic references via various in-house calibers depending on complications: the RD720SQ (automatic with micro-rotor), RD512SQ (flying tourbillon), RD780 (flyback chronograph), among others. Without precise reference confirmation, this DBEX0707 likely employs either Caliber RD720SQ or similar skeletonized automatic architecture—Roger Dubuis manufactures movements entirely in-house at the Meyrin facility outside Geneva, maintaining complete vertical integration from design through finishing.
The skeletonization philosophy at Roger Dubuis differs fundamentally from traditional approaches. Rather than starting with complete movement and removing material to create apertures, Roger Dubuis designs components from conception for open-worked execution—bridges fabricate as architectural frameworks rather than solid plates, creating three-dimensional mechanical sculpture rather than movement with cosmetic cutouts. The signature star-shaped bridge (typically visible at 9 o'clock on dial side) employs five arms radiating from central hub, providing structural support while maximizing visual transparency through movement layers.
The micro-rotor winding system (if RD720SQ caliber) employs peripheral rotor traveling around movement perimeter rather than traditional central rotor—this allows reduced movement thickness while maintaining automatic winding efficiency. The micro-rotor fabricates from heavy metal (typically tungsten or platinum alloy) achieving sufficient mass despite compact dimensions. The rotor design incorporates architectural styling consistent with overall movement aesthetic—angular geometry, cutouts creating negative space, precision finishing visible through sapphire crystals.
The movement operates at 28,800 vibrations per hour (4 Hz), employs approximately 30-35 jewels (exact count varies by caliber), and delivers 72-hour power reserve from single barrel—Roger Dubuis standardized on 72-hour reserve across modern calibers, providing three full days autonomy versus traditional 40-48 hour standards. The movement diameter fills the case generously, creating visual impact through dial-side and caseback apertures.
The skeletonized dial construction eliminates traditional solid dial plate, instead employing peripheral flange with printed minute track and applied hour markers. The flange—the ring running around dial perimeter—likely fabricates from rhodium-plated brass or similar alloy, creating contrast against the titanium movement components visible beneath. The hour markers employ faceted three-dimensional shapes rather than simple batons—Roger Dubuis typically uses "screw-like" markers resembling mechanical fasteners, maintaining thematic consistency with the brand's architectural, engineering-focused aesthetic.
Luminous material (Super-LumiNova) fills the hour marker centers and hand tips, providing low-light legibility despite the watch's sculptural rather than purely functional design ethos. The hands fabricate from skeletonized titanium or rhodium-plated alloy, sized generously for visibility against the complex movement backdrop. Green accents throughout the dial (visible in the image as green-tinted elements) likely coordinate with the bezel gemstones—Roger Dubuis frequently employs colored components within movements and dials creating thematic unity with external design elements.
