Harry Winston's Ocean collection presents two sophisticated complications for the first time in a single watch, the Ocean Tourbillon Jumping Hour. The Jumping Hour complication, a first for the Ocean collection, adds dynamism to a striking timepiece, driven by the Harry Winston manufacture calibre HW4401, which took more than 1,500 hours to develop and was designed entirely by the Maison. The tourbillon, originally developed in the early 19th century, is considered one of the most complex technical challenges in watchmaking. Today, it is much loved by connoisseurs not only for the history and craftsmanship it represents, but also for the hypnotic effect that distinguishes it from any other complication. The tourbillon of the Ocean Tourbillon Jumping Hour has a very unusual design: instead of being on the back of the mainplate, it is held suspended by two hand-bevelled steel bridges that seem to lift it into space, with no apparent mechanical connection to the rest of the watch. Only a close look reveals the secret: the tourbillon is driven by a wheel integral with its outer circumference, almost completely hidden by the dial's chapter ring. Floating between two sapphire crystals, the open structure of the tourbillon contrasts with the intense opacity of the dial, which is also suspended on a system of skeleton bridges, meticulously finished by hand. Made of black sapphire, the dial shows the time through an aperture at 12 o'clock, which instantly 'jumps' once an hour. Unlike many Jumping Hours, the Ocean Tourbillon Jumping Hour has a specially designed minute hand to prevent the hour window from getting stuck. This model offers a striking visual experience: the design draws its inspiration from modernist architecture, exploiting the extraordinary structural and visual properties of steel and glass to create a bold geometry.
OCEAN TOURBILLON JUMPING HOUR
Technical characteristics of the movement
Calibre HW4401, mechanical with manual winding
Movement size
Total diameter: 36 mm
Thickness: 8.62 mm
Number of components (complete movement): 330 components
Number of rubies: 41
Power reserve: 110 hours
Two barrels in series
Variable inertia rocker arm, Alternations per hour: 28,800 (4Hz)
Flat spiral
Hand-chamfered, micro-sandblasted plate
Hand-beveled and levelled bridges
Tourbillon
60-second rotation cycle
Tourbillon weight: 0.49 gr
Movement finish
Skeletonised movement
Côtes de Genève
Black DLC treatment, micro-sandblasted
Perlage on the time train
