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Baselworld2015: Harry Winston Histoire de Tourbillon 6

by Nick Gould on March 27, 2015

For Baselworld 2015,  Harry Winston unveils the sixth iteration of the the Histoire de Tourbillon collection.  This new watch features two standout complications.  Introducing the Harry Winston Histoire de Tourbillon 6

The watch is 55mm in dimamter with an 18k white gold case.  It combines two independent hour indications: one regulated by a tri-axial tourbillon and the other by a karussel.

Hours and minutes are displayed on one side, regulated by the tri-axial tourbillon. They are recognizable by their color coding – orange against a gray background – and housed within a rounded protrusion on the case. The right side of the watch is distinguished by its blue hands and markings against a black backdrop. It features a dial with hands that can be started, stopped and reset at will. A blue ceramic pusher at 2 o’clock allows this superlative creation to display the elapsed hours and minutes like a chronograph. This unique and versatile function also drives a dual-time display that may be adjusted as desired via the 3 o’clock crown.

HW_Histoire de Tourbillon 6_Black_LD

Harry Winston Histoire de Tourbillon 6

The first complication is the tri-axial tourbillon. The first cage carries the balance wheel and performs one turn every 45 seconds. It rotates inside a second cage, which spins in 75 seconds along its vertical axis. This ensemble is set in motion inside a third, spherical cage, which completes its own revolution in 300 seconds. The latter is the cage featuring the orange seconds hand, visible beneath a sapphire crystal dome that offers a fascinating view of the three-dimensional ballet of time.

The second complication, the karussel performs a 30-second rotation.  If need be, the karrusel positioned at 1 o’clock can remain idle. When started, it acts as the regulator for the independent part of the HW4701 movement, occupying the right side. It is stopped by default, but starts running when the pusher, located on the caseband is pressed. The specific construction of the karussel means that its balance wheel and its cage are simultaneously linked to the movement’s energy source. Even when halted, they are under constant tension and when released, instantly accelerate to cruising speed. This extremely rare karussel, with a 30-second rotation, operates at high speed in order to occupy a maximized number of positions in space.

IMG_5933

Live shot taken of the watch as Baselworld2015

With this regulator, time displays can be personalized. The movement on the right side is akin to a monopusher chronograph and replicates that function. Its hands, however, are adjustable via a crown at 3 o’clock. Therefore, they can provide a dual-time display that is accurate to the nearest minute. This rare capability is ideal for offset time zones such as India (UTC +5:30), Caracas (UTC – 4:30) or Katmandu (UTC + 5:45).

As in the previous chapters of the Histoire de Tourbillon by Harry Winston, only 20 will be made.

Technical Specifications

Patented movement Caliber

HW4701

  •  Tri-axial tourbillon
  • Display of the hours, minutes, seconds and power reserve
  • Karussel
  • Hours and minutes counter with zero-reset function equipped with carriage stop. Movement operating indicator and power-reserve indicator (Power Reserve gauge)

Movement dimensions

  • Diameter: 40.90 mm x 45.08 mm
  • Height: 17.30 mm

Number of components

  • Complete movement: 683 components
  • Tourbillon: 141 components
  • Karussel: 100 components
  • Tourbillon weight: 1.85 g
  • Karussel weight: 0.697 g

Number of jewels: 90
Power reserve

  • Tri-axial tourbillon: up to 80 hours
  • Karussel: up to 70 hours

Barrels: Two sets of twin fast-rotating series-coupled co-axial barrels equipped with slipping spring in order to avoid excess tension
Balance wheel: Variable-inertia type equipped with gold adjusting screws Frequency
21,600 vibrations/hour (3Hz) for each balance wheel

Balance spring  :Phillips terminal curve and Geneva-type stud for each balance wheel Mainplate
Titanium, shotpeened and chamfered, PVD-coated
Bridges

  • Titanium bridges, shotpeened and chamfered, PVD-coated
  • Screws with S-type slotted mirror-polished heads, shotpeened and chamfered

Tourbillon

  •  Inner carriage containing the balance wheel and escapement pinion with 45-second rotation cycle
  • Intermediate carriage with 75-second rotation cycle
  • Outer carriage with 300-second rotation cycle

Karussel: Carriage rotation in 30 seconds
Display

  • Excentered polished rhodium-plated orange SLN Hours and Minutes in a counter at 10 o’clock
  • Seconds indicator on the tri-axial tourbillon carriage at 8 o’clock
  • Polished rhodium-plated orange SLN of the Hours and Minutes’ power-reserve at 12 o’clock
  • Openworked chronograph hours and minutes in untreated Avional at 3 o’clock
  • Chronograph operating indicator at 2 o’clock
  •  Polished rhodium-plated blue SLN chronograph power reserve at 5 o’clock
  •  Chronograph karussel at 1 o’clock

Case Material

  • 18K white gold, polished, satin-brushed and shotpeened
  • Blue ceramic pusher Case dimensions
  • Diameter: 55 mm x 49 mm (edges of the bezel)
  • Height: 21.80 mm

Glace

  • Shaped sapphire crystal for the 3 o’clock zone with anti-reflective treatment on both sides
  • Shaped crystal for the 10 o’clock hours and minutes zone with anti-reflective treatment on both sides
  • Domed sapphire crystal on the tourbillon with anti-reflective treatment on both sides

Case back

  • Open
  • Sapphire crystal with anti-reflective treatment on both sides

Water resistance 3 bars

Crown
18K white gold and rubber

Strap
Hand-sewn black alligator leather Buckle
18K white gold double ardillon buckle

Limited edition: 20 pieces

Collection: Histoire de Tourbillon

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