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  • De Bethune

DB28

Kind of Blue Tourbillon

Reference: DB28TBRBN / S

In honour of the colour blue, a fundamental element of its identity, De Bethune presents a monochromatic range of its iconic model the DB28 Tourbillon. Radical and magnetic, the colour is created by an artisanal and natural treatment of the metals.

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:
Blued grade 5 polished titanium hours ring with rose gold hour-markers – Blued grade 5 satin-polished titanium minutes ring – Ultra-light De Bethune 30’’ tourbillon in silicon and titanium at 6 o’clock

Hands:
Hand-polished rose gold

case

Blued grade 5 mirror-polished titanium – diameter 42.6 mm – thickness 9.20 mm 

Attachments:
Short or long floating lugs in blued grade 5 mirror-polished titanium, De Bethune Patent (2006)

Glass:
Sapphire crystal, 1800 Vickers hardness with double anti-reflective treatment
Crown at 3 o’clock, setting in two positions

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

calibre

DB2019 calibre

Movement:
Mechanical hand-wound 

Diameter 30 mm – 282 parts – Motion works bridge and cover plate in grade 5 titanium, mirror-polished and blued by hand –  Bridge cover on the barrel decorated in grade 5 mirror-polished and blued titanium, encrusted by hand with stars in white gold – Rose-work grinding by hand on the barrels – Decoration on power reserve indicator in grade 5 titanium “De Bethune” concentric graining and blued by hand – Steel parts bevelled and flame-blued by hand

- Self-regulating twin barrel, De Bethune Innovation (2004)
- Silicon annular balance encircled by a white gold ring, De Bethune Patent (2010)
- "De Bethune" balance-spring with flat terminal curve, De Bethune Patent (2006)
- Silicon escape wheel
- Ultra-light De Bethune 30’’ tourbillon in silicon and titanium, De Bethune Innovation (2008)

Jewelling:
38 jewels

Frequency:
36,000 vibrations per hour

Power reserve:
5 days

strap

Extra-supple alligator leather, alligator lining

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