DB25 Perpetual Calendar

Specifications

About this reference

De Bethune’s interpretation of the perpetual calendar is a poetic masterpiece, seamlessly blending horological sophistication with the Manufacture’s cutting-edge innovations. Housed in a refined 44mm titanium case, this exceptional timepiece unites a meticulously crafted perpetual calendar, a mesmerizing star-studded sky, and precise moon phase indications—embodying both technical brilliance and celestial artistry. Specification: Case: Grade 5 titanium; Case · Diameter: 44 mm; Case · Thickness: 11,1 mm; Case: Lugs :; Case: Ogival lugs; Case: Crystal :; Case: Saphir crystal (1800 Vickers hardness), with double anti-reflective coating; Case: Case back :; Case: Open case back in polished grade 5 titanium; Case: Saphir 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 manual-winding calibre; Calibre · Power reserve: 6 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; Calibre: Technical features of calibre; Calibre: Titanium balance wheel with white gold inserts, optimised for temperature differences and air penetration , De Bethune Patent (2016); Calibre: "De Bethune" balance-spring with flat terminal curve, De Bethune Patent (2006); Calibre: Silicon escape wheel; Calibre: Spherical moon phase indication accurate to a degree of one lunar day every 122 years – De Bethune Patent (2004); Calibre: Triple pare-chute shock-absorbing system, De Bethune Innovation (2005); Calibre: Optimized oscillating weight in titanium and white gold; Calibre: Oscillating weight shock-absorbing s