DB 28 ST Technical Features:
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.
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. (* Patents registered by the Manufacture De Bethune)
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. (* Patents registered by the Manufacture De Bethune)
De Bethune 30" silicon/titanium Tourbillon 36,000 vph, the fastest and the lightest on the market, comprising 64 parts weighing 0.18 grams
Silicon escape wheel - Central jumping seconds - Jewelling : 47 jewels - Frequency : 36,000 vibrations per hour - Power reserve: 4 days
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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