De Bethune caliber DB2509
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| Brand: | De Bethune |
|---|---|
| Reference: | DB2509 |
| Movement: | Handwound |
| Display: | Analog |
| Jewels: | 48 |
| Reserve: | 96 |
| Frequency: | 36000 |
| Date: | Date, Day, Leap Year, Month, Perpetual Calendar |
| Hands: | Hours, Jumping Seconds, Minutes |
| Astronomical: | Moonphase |
| Additionals: | Power Reserve Indicator, Tourbillon Escapement |
DB2509 description
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 accurate to a degree of one lunar day every 122 years
Retrograde age of the moon indication
