DB28 Kind of Blue

Specifications

About this reference

Blue: a fundamental element of De Bethune’s identity. This monochrome edition of the iconic DB28 model is both radical and magnetic. Its captivating hue is achieved through a meticulous, handcrafted metal treatment using entirely natural processes. Specification: Case: Anthracite zirconium sandblasted; Case · Diameter: 43 mm; Case · Thickness: 9,30 mm; Case · Lugs: Short or long floating lugs in blued mirror-polished grade 5 titanium, De Bethune Patent (2006); Case · Crystal: Sapphire crystal (1800 Vickers hardness), with double anti-reflective coating; Case · Case back: Screwed down back in blued polished grade 5 titanium that opens on a linear power reserve in rose gold 5N; Case: Sapphire crystal (1800 Vickers hardness), with double anti-reflective coating; Function: Hours, Minutes, Spherical moon phase indication at 6 o’clock, Power reserve situated on the back, Performance indication between 2 and 3 o’clock; Calibre · Calibre: DB2115V4; Calibre · Type: Mechanical manual-winding calibre; Calibre · Power reserve: 6 days, ensured by a self-regulating twin barrel, De Bethune Innovation (2004); Calibre · Number of parts: 297; Calibre · Jewelling: 38 jewels; Calibre · Diameter: 30 mm; Calibre · Frequency: 28’800 vibrations per hour; Calibre · Adornment: Handmade, blued grade 5 mirror-polished titanium motion works bridge; Calibre: Plate cover and bridge cover on the barrel in grade 5 blued titanium, adorned with “Côtes De Bethune”; Calibre: Barrels decorated with rose-work grinding; Calibre: Power reserve indicator in grade 5 titanium, hand decorated with “De Bethune” concentric graining and blued by hand; Calibre: Steel parts beveled, polished and flame-blued by hand; Dial: Blued grade 5 polished titanium hours ring with rose gold hour-markers; Dial: Blued grade 5 satin-polished titanium minutes ring; Dial: Spherical moon phase indication in palladium and flamed-blued steel with an accuracy of one lunar day every 122 years at 6 o’clock, De Bethune Patent (2004); Dial: Performance indicator between 2 and 3 o’clock; Dial: Hands:; Dial: Rose gold hands; Technical features of calibre: Titanium balance wheel with white gold inserts, optimised for temperature differenc