De Bethune caliber DB2109V4
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| Brand: | De Bethune |
|---|---|
| Reference: | DB2109V4 |
| Movement: | Handwound |
| Display: | Analog |
| Diameter: | 30.00 |
| Jewels: | 43 |
| Reserve: | 96 |
| Frequency: | 36000 |
| Hands: | Hours, Minutes, Jumping Seconds |
| Additionals: | Tourbillon Escapement |
DB2109V4 description
Hand-wound movement with a diameter of 30 mm and a total of 260 parts – silver plate and barrel bridge cover polished – hand-snailed barrels – hand-polished, chamfered steel parts
- Self-regulating twin barrel, De Bethune innovation (2004)
- Titanium balance wheel with white gold inserts, De Bethune patent (2016)
- "De Bethune" balance-spring with flat terminal curve, De Bethune patent (2006)
- silicon escape wheel
- ultra-light De Bethune 30’’ tourbillon in titanium, De Bethune innovation (2008)
- De Bethune dead beat second, De Bethune innovation (2011)
