DB25 Moon-Phase Technical Details

Name: DB25 Moon Phase
Reference: DB25LRS1V

Functions: Hours, Minutes, Spherical moon phase indication at
12 o’clock, Power reserve situated on the back
Movement: DB2105V1
Type: Mechanical hand-wound movement
Adjustment: Winding, setting the spherical moon phase and the time by means of the crown (3 positions)

Technical features of calibre DB2105V1

Number of parts: 305
Jewelling: 29 jewels
Diameter: 30 mm
Power reserve: 6 days, ensured by a self-regulating twin barrel
De Bethune Innovation (2004)

Specificities: Titanium and platinum balance wheel with blom studs
De Bethune Patent (2008)

"De Bethune" balance-spring with flat terminal curve
De Bethune Patent (2006)

Silicon escape wheel

Spherical moon phase indication accurate to a degree of one lunar day every 122 years – De Bethune Patent (2004)

Triple pare-chute shock-absorbing system
De Bethune Innovation (2005)

Frequency: 28,800 vibrations per hour

Adornment: Silver plate and barrel bridge cover adorned with
“Côtes De Bethune”
Hand snailed barrels
Hand-polished, chamfered steel parts


Display: Hand-polished flame-blued steel curved hands
Spherical moon phase indication in palladium and flamed-blued steel with an accuracy of one lunar day every 122 years at 12 o’clock – De Bethune Patent (2004)

Dial : Silver-toned hand-guilloché, with 12 radiating sectors
De Bethune star-studded sky in blued mirror-polished steel, inlaid with rose gold stars
Silver curved hour and moon phase rings with black relief Roman numerals

Case and strap

Case material: Rose gold 5N
Case diameter: 44 mm
Case thickness: 11,2 mm
Lugs: Integrated, hollowed lugs
Crystal: In sapphire crystal (1800 Vickers hardness) with double anti-reflective coating
Case back: Open back in polished rose gold and linear power reserve on the back
Sapphire crystal (1800 Vickers hardness) with double anti-reflective coating
Water-resistance: 3 ATM
Strap: Extra-supple alligator leather, alligator lining
Buckle: Pin buckle in rose gold 5N