Current collection

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DB28

Steel Wheels Sapphire Tourbillon

Reference: DB28SWTTIS1

Faithful to the DNA of the ‘Maison’ nestled in Sainte Croix in the Swiss Jura mountains, the DB28 Steel Wheels Sapphire Tourbillon ably perpetuates the heritage of its predecessors: perfect balance, contemporary and bold aesthetics at the service of exceptional mechanics. A limited edition of only 10 pieces.

functions

Hours, Minutes, 30’’ indicator via the ultra-light De Bethune tourbillon cage at 6 o’clock, Power reserve situated on the back

display

Dial:
Circular-grained titanium hours ring – Spherical polished titanium hour-markers set and 30" dial on a blued polished titanium circle – Ultra-light De Bethune 30" tourbillon in titanium, De Bethune innovation (2008)

Hands:
Minutes and hours hand in hand-polished snad-blasted blued titanium

case

Polished grade 5 titanium – diameter 43 mm – thickness 9,8 mm 

Attachments:
Floating lugs in mirror-polished grade 5 titanium, De Bethune Patent (2006)

Glass:
Sapphire crystal, 1800 Vickers hardness with double anti-reflective treatment
Crown at 12 o’clock, setting in two positions

Back:
Open in polished grade 5 titanium that opens on a linear power reserve in rose gold 5N
Sapphire crystal (hardness of 1800 Vickers) with double anti-reflective coating

calibre

DB2019V5 calibre

Movement:
Mechanical hand-wound

Diameter 30 mm – 272 parts – Concave polished grade 5 titanium plate cover –  Hand made mirror-polished grade 5 titanium motion works bridge – Barrels bridge adorned with “Côtes De Bethune” and “microlight” engraving – 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)

Jewelling:
39 jewels

Frequency:
36,000 vibrations per hour

Power reserve:
5 days

strap

Extra-supple alligator leather, alligator lining

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