De Bethune caliber 2509

De Bethune caliber 2509
Brand:De Bethune
Reference:2509
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

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

All watches using this caliber: