For the boat lovers amongst us, Ulysse Nardin introduces the Grand Deck Marine Tourbillon. On the dial, hand-crafted wood marquetry evokes a ship’s deck, while the time display is original and creative: a boom pulled by super-strong nanowires indicates the minutes, while the hours are displayed on two concentric disks. The patented device, which is regu-lated by a second barrel, also incorporates a tourbillon. It’s limited to 18 white gold pieces. Price 280.000 euro excluding v.a.t..
In the inno-vative Grand Deck Marine Tourbillon model, the retrograde minutes display takes the form of a boom. The tech-nology is visually fascinating, and as complex as it is accomplished. Linked to a 60-second flying tourbillon, this patented system is drawn by a super-strong hi-tech fiber that is thinner than a human hair. The Manufacture, as a pioneer in marine chronome-ters, has a long and distinguished history of producing high-precision seafaring instruments that have helped conquer the oceans since the 19th century.
The minutes hand is replaced by a boom – the horizontal spar used to angle the head sail. Working like the halyard cord that is used to hoist the sails of a ship, a wire pulls the boom across a graduated arc. The boom jumps back once an hour, its speed regulated by a pur-pose-designed retrograde mechanism. The mesmerizing leap takes 3 to 4 seconds and can be viewed through the case back. The boom is pulled by a nanowire that measures a mere 0.0357 mm in diameter and is capable of withstanding traction of 1.41 kg without stretching. The nanowire is made of polyethylene Dyneema® fiber, a ma-terial that is used in ship’s rigging and is many times stronger than steel. In a first for watchmaking, the transmis-sion system loops the wires through a rigging screw: two strands are visible, and a third strand fastens the turn-buckle. The patented system, which is visible on the dial, is exclusive to Ulysse Nardin. Working like the winches that hoist the sails on deck, four ‘pulleys’ use a drive gear, a spiral tensioning spring and two lock pins. The jump-ing hour is driven by two large concentric disks that turn in real time, and is displayed through a double aperture. A corrector positioned at 2 o’clock can be used to set the time quickly.
The Manufacture’s Caliber UN-630, a 60-second flying tourbillon with manual-winding movement, contains 469 components and oscillates at a frequency of 3 Hz. Despite the considerable power requirements of the boom dis-play, the movement offers a power reserve of over 48 hours. A first barrel is de-voted to the time-telling mechanism; a second barrel supplies power to the complication, i.e. to the display of hours and minutes. The latter device is regulated by a specific escapement that collects information from the time-telling mechanism. The double-barrel design (one for the movement and another for the display) prevents the complication from interfering with the workings of the watch. When the watch is wound, the spring winds up into the center of the barrel. Conversely, when the spring is spent it unwinds out towards the edge of the barrel.
Limited Edition: 18 pieces Movement
Caliber: UN-630 21’600 v/h Tourbillon with an exclusive boom display Power-Reserve Approximately 48 hours Winding Manual-winding
Functions: Jumping hour in a double aperture Minutes on a graduated arc 60 seconds flying tourbillon Forward and backward hour corrector
Case: 18 ct white gold, fluted bezel Crown Screw-down security crown covered with rubber. Diameter 44 mm. Water-Resistance 100 m .
Dial: Hand-crafted wood marquetry Minutes arc of blue spinel in the centre of the dial Blued aluminum boom indicates minutes
Crystal: Anti-reflective sapphire crystal
Case-Back: Sapphire crystal
Bracelet: Leather with a folding buckle
Source Ulysse Nardin.