DB28GS Grand Bleu

Availability: see it at 430 Park Avenue

• Case: black zirconium case middle, titanium caseback and bezel
• Size: 44mm
• Movement: hand-wound manufacture movement DB2080
• Function: power reserve, button at 6 o'clock activates dial light
• Power Reserve: approximately five days
• Water Resistance: 100m
• Dial: satin-brushed titanium minute ring with cut-out numerals
• Caseback: titanium
• Hands: blued titanium, luminous tips
• Strap/Bracelet: delivered with two straps: canvas and striated rubber
• Factory Warranty: two years

The DB28GS Grand Bleu was designed and developed to be a resolutely sporty watch with a new caliber; water resistance to more than 100 meters; excellent readability including in the darkest depths thanks to ingenious lighting inside the movement; a different bezel that rotates this time with the crystal to indicate dive times; a titanium case for a light feel and a rubber strap for convenience; along with a five-day power reserve.

To illuminate the watch and the movement from the inside, the slightly bluish white light source is produced by a fully mechanical means that works on the dynamo principle.  As simple as the lighting of a bicycle, fully mechanical with no electronics and no battery. A pusher at 6 o’clock activates a small gear train driven by the twin barrel. This gear train, by means of a miniature dynamo, provides the necessary energy for lighting the watch. A few seconds of light is more than enough to read the time, even in the middle of the night.

New Caliber: Hand-wound, with central seconds and a five-day power reserve indicated on the dial, this is the 27th caliber entirely developed and manufactured by the Manufacture De Bethune, equipped with a state-of-the-art in-house-made balance wheel.  The presence of the titanium / white gold balance wheel and balance-spring with flat terminal curve ensures an ideal mass / inertia ratio for an optimal frequency of 28,800 vph.    The caliber is equipped with the triple pare chute system. De Bethune was not only the first to design a bridge symmetrical held on both sides and thus serving to maintain the balance wheel perfectly in position, but also added two shock absorbers on either end as well as that of the balance wheel itself. Hence the name triple pare chute.

The model is delivered with two straps: a canvas version and a striated natural rubber iteration with titanium folding clasp.