De Bethune DB 28 ST

DB 28 ST is a new model from De Bethune that features a silicon/titanium tourbillon, the lightest and fastest on the market, combined with the jumping seconds mechanism. The movement that powers this timepiece is Calibre DB2119, a hand wound movement that itself incorporate some technological breakthroughs like Self-regulating twin barrel and silicon/white gold balance wheel with flat terminal curve.

Its creators David Zanetta and Denis Flageollet were painstakingly gone through each aesthetic details of the watch;  from the choice of materials to the curves, the volumes, the shape of the hands, and of course the finish. The soft gleam of the platinum bezel effects the transition from the cool shade of the titanium case to the warmth of the sterling silver chapter ring. The layered dial structure is built around suspension bridges featuring fine lines and multiple decorations serving to elevate the central mechanism as well as enhancing its functionality.

Technical details

Functions
Hours – minutes – central jumping seconds -Tourbillon with 30-second indication

Movement
Calibre DB2119 – mechanical hand-wound
Hand-decorated mainplate, hand-chamfered and polished steel parts
Silicon escape wheel
Central jumping seconds
Jewelling: 47 jewels
Frequency: 36,000 vibrations per hour
Power reserve: 4 days

DB2119 incorporates the major De Bethune technological breakthroughs:

  • Self-regulating twin barrel – The barrels are specifically designed to eliminate friction and efficiently transmit a maximum of energy.
  • Silicon/white gold balance wheel with flat terminal curve – Its exceptional lightness enables this balance wheel to reduce mechanical friction and deliver an ideal inertia/mass ratio. The principle of the flat end curve, placed on the same level as the balance-spring, compensates for off-centering and facilitates its fastening.
  • De Bethune 30″ silicon/titanium Tourbillon 36,000 vph, le the fastest and the lightest on the market, comprising 64 parts weighing 0.18 grams

Case
Round shape, 43 mm in diameter, made of mirror-polished grade 5 titanium
Thickness: 12.3 mm
Lugs: floating type in grade 5 titanium with pivoting system. Their springs follow the shape of the wrist and its movements
Platinum bezel
Glass: sapphire crystal with double glareproofing, 1800 Vickers
Crown: screw-locked at 12 o’clock – adjustable in two positions
Back: solid, hunter-type, in mirror-polished grade 5 titanium, inspired by pocket-watches

Dial
Silver-toned with hand-decorated mainplate and bridges, hand-chamfered steel parts, Côtes de Bethune motif
Chapter ring in grained and engraved sterling silver
Linear power-reserve indicator with jewelled bars at 6 o’clock
Hands: cut-out, mirror-polished, flame-blued steel

Strap
Extra-supple alligator leather with pin buckle

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