DB28GS GRAND BLEU Technical Details

Name: DB28GS Grand Bleu
Reference: DB28GSV2AN
Functions: Hours, Minutes, Seconds, Power reserve indication between 9 and 10 o’clock, unidirectional rotating bezel, manual dial lighting
Movement: DB2080
Type: Mechanical hand-wound movement
Adjustment: Winding and setting the time by means of the crown (2 positions), push button at 6 o’clock to activate the lightening

Technical features of calibre DB2080

Number of parts: 400
Jewelling: 51 jewels
Diameter: 30 mm
Power reserve: 5 days, ensured by a self-regulating twin barrel
De Bethune Innovation (2004)

Specificities: 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

Triple pare-chute shock-absorbing system
De Bethune Innovation (2005)

Dial lighting produced by an entirely mechanical means working on the dynamo principle powered by a twin barrel and manually controlled via a pusher
De Bethune Innovation (2019)

Frequency: 28,800 vibrations per hour
Adornment: Mirror- polished grade 5 titanium motion-work bridge
Plate and barrel bridge covers in hand-smoothed grade 5 titanium and adorned with “Microlight engraving”
De Bethune Innovation (2007)
Hand-snailed barrels
Hand-polished and chamfered steel parts


Display: Blued titanium hours and minutes hands with polished steel insert and second blued steel insert, luminescent tip
Polished steel seconds hand with luminescent tip
Power-reserve indicator between 9 and 10 o’clock

Dial: Satin-brushed grade 5 titanium minutes dial with cut-out Arabic numerals
Rotating bezel crystal with metallised minutes ring

Case and Strap

Case material: Black zirconium case middle with “Microlight” decoration, brushed and polished grade 5 titanium caseback and bezel
Case diameter: 44 mm
Case thickness: 12.8 mm
Lugs: Floating lugs in brushed grade 5 titanium – De Bethune Patent (2006)
Crystal: In sapphire crystal (1800 Vickers hardness) with double anti-reflective coating
Case back: open in brushed grade 5 titanium
Water resistance: 10 ATM
Strap: Natural rubber strap + 1 canvas / leather strap
Buckle: Folding clasp in brushed grade 5 titanium