DB25
Perpetual Calendar
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.
Rose gold-toned – hand-guilloché in 12 radiating sectors with apertures indicating the day of the week at 9 o’clock and the month at 3 o’clock– subdial 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 – De Bethune star-studded sky in mirror-polished flame-blued steel inlaid with yellow gold stars – spherical moon-phase indication in palladium and flame-blued steel at 12 o'clock.
Hands:
curved in hand-polished flame-blued steel
Attachments:
Integrated, hollowed lugs
Glass:
Sapphire crystal, 1800 Vickers hardness with double anti-reflective treatment
Crown at 3 o’clock, setting in three positions
Back:
Open back in polished platinum
Sapphire crystal (1800 Vickers hardness) with double anti-reflective coating
DB2324 calibre
Movement:
self-winding movement
Diameter 30 mm – 425 parts – ¾ plate with starry decor, sandblasted and snailed by hand – Balance bridge and oscillating weight arms in blued titanium – Hand-polished, chamfered steel parts
- Self-regulating twin barrel, De Bethune Innovation (2004)
- Titanium and platinum balance wheel with blom studs, De Bethune Patent (2008)
- "De Bethune" balance-spring with flat terminal curve, De Bethune Patent (2006)
- Silicon escape wheel
- Spherical moon phase indication accurate to a degree of one lunar day every 122 years, De Bethune Patent (2004)
- Triple pare-chute shock-absorbing system, De Bethune Innovation (2005)
- Optimized oscillating weight in titanium and white gold
- Oscillating weight shock-absorbing system, De Bethune Innovation (2006)
Jewelling:
47 jewels
Frequency:
28,800 vibrations per hour
Power reserve:
5 days
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