DB25 Perpetual Calendar

Specifications

About this reference

The De Bethune interpretation of the perpetual calendar is imbued with poetry and combines horological finesse with the cutting-edge mechanisms of the Manufacture by uniting moon phases, a star-studded sky and a perpetual calendar within an exceptional timepiece. Specification: Case: White gold; Case · Diameter: 44 mm; Case · Thickness: 11,1 mm; Case · Lugs: Integrated, hollowed lugs; Case · Crystal: Sapphire crystal (1800 Vickers hardness), with double anti-reflective coating; Case · Case back: Open back in polished white gold; Case: Sapphire crystal (1800 Vickers hardness), with double anti-reflective coating; Function: Hours, Minutes, Spherical moon phase indication and leap-year indication at 12 o’clock, Perpetual calendar indicating the month at 3 o’clock, the date at 6 o’clock and the day of the week at 9 o’clock; Calibre · Calibre: DB2324; Calibre · Type: Mechanical self-winding calibre; Calibre · Power reserve: 5 days, ensured by a self-regulating twin barrel, De Bethune Innovation (2004); Calibre · Number of parts: 425; Calibre · Jewelling: 47 jewels; Calibre · Diameter: 30 mm; Calibre · Frequency: 28’800 vibrations per hour; Calibre · Adornment: ¾ plate with starry decor, sandblasted and snailed by hand; Calibre: Balance bridge and oscillating weight arms in blued titanium; Calibre: White gold oscillating weight hand snailed; Calibre: Hand-polished, chamfered steel parts; Dial: Silver-toned hand-guilloché, with 12 radiating sectors; Dial: De Bethune star-studded sky in blue steel, inlaid with gold stars; Dial: Silver-toned curved hour, date and moon phase rings with Black relief Roman numerals; Dial: Perpetual calendar apertures indicating the day of the week at 9 o’clock and the month at 3 o’clock – sub dial at 6 o’clock indicating the day of the month – leap year indicated by a gold pastille appearing in the starry sky at 12 o’clock; Dial: Spherical moon phase indication in palladium and flame-blued steel with an accuracy of one lunar day every 122 years at 12 o’clock, De Bethune Patent (2004); Dial: Hands:; Dial: Hands curved, in hand mirror-polished steel; Technical features of calibre: Titanium and platinum balance wheel with blom studs, De Bethun