Perpetual Calendar 40mm

Ref: DB25SQPATIS13

De Bethune’s vision of the perpetual calendar is a masterful fusion of technical sophistication and poetic artistry. Housed in an elegant 40mm case, this exceptional timepiece seamlessly integrates moon phases, a celestial sky, and an advanced perpetual calendar, embodying the Manufacture’s commitment to both horological finesse and cutting-edge innovation.

Functions

Hours, Minutes, Spherical Moon Phase and Leap-Year Indicators at 12 o’clock, Perpetual calendar indicating the month at 3 o’clock, the date at 6 o’clock and the day of the week at 9 o’clock

Case

Material

Grade 5 titanium

Diameter

40 mm

Thickness

11.3 mm

LugS

Ogival lugs

Crystal

Sapphire crystal (1800 Vickers hardness), with double anti-reflective coating

CASE back

Open case back in polished grade 5 titanium
Sapphire crystal (1800 Vickers hardness), with double anti-reflective coating

Calibre DB2324V2

TYPE

Mechanical manual-winding calibre

POWER RESERVE

6 days, ensured by a self-regulating twin barrel, De Bethune Innovation (2004)

TECHNICAL FEATURES

Titanium balance wheel with white gold inserts, optimised for temperature differences and air penetration , De Bethune Patent (2016)
“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)
Optimized oscillating weight in titanium and white gold
Oscillating weight shock-absorbing system, De Bethune Innovation (2006)

Display

DIAL

Bicolor silver and blue hand-guilloché, with 12 radiating sectors
De Bethune star-studded sky in blued titanium, inlaid with rose gold stars
Curved hour, date and moon phase rings with silver relief Roman numerals
Perpetual calendar apertures indicating the day of the week at 9 o’clock and the month at 3 o’clock on anthracite discs with silver decal – sub dial at 6 o’clock indicating the day of the month – leap year indicated by a gold pastille appearing in the starry sky at 12 o’clock
Spherical moon phase indication in palladium and blued steel with an accuracy of one lunar day every 122 years at 12 o’clock – De Bethune Patent (2004)

HANDS

Hand-polished steel curved hands

Specifications

Watch

Case

Material

Grade 5 titanium

Diameter

40 mm

Thickness

11.3 mm

Lugs

Ogival lugs

Crystal

Sapphire crystal (1800 Vickers hardness), with double anti-reflective coating

CASE back

Open case back in polished grade 5 titanium
Sapphire crystal (1800 Vickers hardness), with double anti-reflective coating

Display

Dial

Bicolor silver and blue hand-guilloché, with 12 radiating sectors
De Bethune star-studded sky in blued titanium, inlaid with rose gold stars
Curved hour, date and moon phase rings with silver relief Roman numerals
Perpetual calendar apertures indicating the day of the week at 9 o’clock and the month at 3 o’clock on anthracite discs with silver decal – sub dial at 6 o’clock indicating the day of the month – leap year indicated by a gold pastille appearing in the starry sky at 12 o’clock
Spherical moon phase indication in palladium and blued steel with an accuracy of one lunar day every 122 years at 12 o’clock – De Bethune Patent (2004)

Hands

Hand-polished steel curved hands

Calibre

TYPE

Mechanical manual-winding calibre

POWER RESERVE

6 days, ensured by a self-regulating twin barrel, De Bethune Innovation (2004)

Number of parts

423

Jewelling

48 jewels

Diameter

30 mm

Frequency

28’800 vibrations per hour

Adornment

¾ plate with starry decor, sandblasted and snailed by hand
Balance bridge and oscillating weight arms in blued titanium
White gold oscillating weight hand snailed
Hand-polished, chamfered steel parts

TECHNICAL FEATURES

Titanium balance wheel with white gold inserts, optimised for temperature differences and air penetration , De Bethune Patent (2016)
“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)
Optimized oscillating weight in titanium and white gold
Oscillating weight shock-absorbing system, De Bethune Innovation (2006)

Resources

Technical Description

Contact

For any questions, our
team is at your disposal

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