DB28 Tourbillon Technical Details

Name: DB28 Tourbillon
Reference: DB28TTIS8N / S


Functions: Hours, Minutes, 30’’ indicator via the ultra-light De Bethune tourbillon cage at 6 o’clock, Power reserve situated on the back
Movement: DB2019
Type: Mechanical hand-wound movement
Adjustment: Winding and setting the time by means of the crown (2 positions)

Technical features of calibre DB2019
Number of parts: 282
Jewelling: 38 jewels
Diameter: 30 mm
Power reserve: 5 days, ensured by a self-regulating twin barrel
De Bethune Innovation (2004)

Specificities: Silicon escape wheel encircled with 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)

Frequency: 36,800 vibrations per hour

Adornment: Black polished steel motion-work bridge and barrel bridge
Ruthenium plate cover adorned with “Côte
De Bethune”
Hand snailed barrels
Hand-polished and chamfered steel parts

Display:
Display: Hand-polished stainless steel hands
Ultra-light De Bethune 30’’ tourbillon in silicon and titanium at 6 o’clock – De Bethune Innovation (2008)

Dial : Black in mirror-polished steel
Mirror-polished and silver-toned minutes ring
Black hour ring with black mirror-polished steel markers

Case and strap

Case material: Mirror-polished grade 5 titanium
Case diameter: 42.6 mm
Case thickness: 9,20 mm
Lugs: Short or long floating lugs in mirror-polished grade 5 titanium
De Bethune Patent (2006)
Crystal: In sapphire crystal (1800 Vickers hardness) with double anti-reflective coating
Case back: Closed and screwed down case back in polished grade 5 titanium that opens on a linear power reserve in rose gold 5N
Sapphire crystal (1800 Vickers hardness) with double anti-reflective coating
Water resistance: 3 ATM
Strap: Extra-supple alligator leather, alligator lining
Buckle: Buckle and ardillon in mirror-polished grade 5 titanium