Current collection

Hours, minutes, central jumping seconds, date at 6 o’clock, perpetual calendar indicating the the day at 9 o’clock and the month at 3 o’clock. Spherical moon-phase indication and leap-year indication at 12 o’clock. Central Dead Beat Second, 30’’ indicator via the ultra-light De Bethune tourbillon cage. Power reserve indicator and age of the moon indication on the case back.

Hands
Curved, in hand-polished and flame-blued steel.
Dial
5N rose gold – sunburst hand-guilloché motif – apertures indicating the day at 9 o’clock and the month at 3 o’clock – dial indicating the day at 6 o’clock – De Bethune star-studded sky in flame-blued steel set with gold stars, featuring spherical moon-phase indication in platinum and flame-blued steel and a leap year indication at 12 o’clock.

Platinum. Diameter: 43mm-Thickness: 13.4mm
Attachments
Cone-shaped lugs.
Glass
Sapphire crystal with double anti-reflective coating (1800 Vickers).
Back
Open on the 30’’ indicator via the ultra-light De Bethune tourbillon cage.
Mechanism of the central jumping seconds, retrograde age of the moon indication on a sector dial, power reserve indication.
Sapphire crystal with double anti-reflective coating (1800 Vickers).

DB2509 Caliber
Movement
Mechanical with manual-winding movement.
Diameter 30 mm – 499 parts – hand-crafted finishing and decoration – Côtes De Bethune
Self-regulating twin barrel – De Bethune innovation (2004)
Silicon annular balance encircled by a white gold ring – De Bethune Patent (2010)
"De Bethune" balance-spring with flat terminal curve – De Bethune Patent (2006)
Silicon escape wheel Ultra-light De Bethune 30’’ tourbillon in silicon and titanium – De Bethune Innovation(2008)
De Bethune Dead Beat Second – De Bethune Innovation (2011)
Spherical moon-phase indication accurate to a degree of one lunar day every 122 years – De Bethune Patent (2004)
Retrograde age of the moon indication – De Bethune Innovation(2013)
Jewelling
48 jewels
Frequency
36’000 vibrations/hour
Power reserve
4 days

Extra-supple alligator leather, alligator lining