De Bethune DB16 Tourbillon Perpetual Calendar

De Bethune has gained a reputation for their innovation in striving to create a more accurate watch using different designs and materials.

David Zanetta and Denis Flageollet deserve tremendous praise for creating such beautiful and complicated timepieces with technical precision.

I have always loved their take on displaying the moonphase using a spherical ball instead of a disc.  The intense blue of the hands on their watches is captivating.

Functions: hours – minutes – central jumping seconds – date at 6 o’clock – perpetual calendar indicating the day at 9 o’clock and the month at 3 o’clock – spherical moon-phase and leap-year indication at 12 o’clock – tourbillon with 30-second indication – power indication – age of the moon indication
Movement: mechanical hand-wound
DB2509 calibre
Power reserve: 4 days
Case: distinctive shape, pink gold – diameter 43 mm (thickness 13.13 mm)
Attachments: cone-shaped lugs
Back: transparent – De Bethune Tourbillon 30” silicon/titanium 36,00 vph – central jumping seconds mechanism – retrograde age of the moon indicator – power-reserve indicator
Display:
Dial: silver-toned, sunburst guilloché motif, with apertures indicating the day of the week at 9 o’clock and the month at 3 o’clock – 6 o’clock dial indicating the day of the month
De Bethune star-studded sky in flame-blued steel encrusted with gold stars, featuring spherical moon-phase indicator in platinum and flame-blued steel at 12 o’clock
Hands: curved, in hand-polished and flame-blued steel
Strap: extra-supple alligator leather strap with pin buckle
DB2509 calibre
Movement: mechanical hand-wound
Functions: hours – minutes – central jumping seconds – date at 6 o’clock – perpetual calendar indicating the day at 9 o’clock and the month at 3 o’clock – spherical moon-phase and leap-year indication at 12 o’clock
Power indication at 6 o’clock – tourbillon with 30-second indication – age of the moon indication
Diameter 30 mm – 330 parts – hand-crafted finishing and decoration – Côtes De Bethune
Self-regulating twin barrel*
Silicon/white gold balance wheel – balance-spring with flat end curve*
De Bethune 30” silicon/titanium tourbillon, 36,000 vph*
Central jumping seconds*
Silicon escape wheel*
Spherical moon-phase indication*
Retrograde age of the moon indication*
Jewelling: 46 jewels
Frequency: 36,000 vibrations per hour
Power reserve: 4 days
* Manufacture De Bethune innovations and registered patents