Ingenieur Family

Ingenieur Constant-Force Tourbillon

Available Exclusively at IWC Boutiques

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reference 5900

The spectacular Ingenieur Constant-Force Tourbillon deserves a leading position in the haute horlogerie Constructors’ Championship. Its patented constant-force mechanism guarantees maximum precision. The double moon display depicts the surface of the earth's natural satellite so realistically that even tiny craters can be recognized.

Highlights

  • Case made of platinum and ceramic
  • 96-hour power reserve
  • Perpetual moon phase display
  • Double moon phases for the northern and southern hemispheres
  • Countdown display showing phases until the next full moon
  • Tourbillon with integrated constant-force mechanism

Price: $290,000

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A POWERFUL DRIVE TO DELIVER HIGHER TORQUE

With the spectacular Ingenieur Constant-Force Tourbillon in its platinum and ceramic case, IWC now leads the field in the Constructors’ championship of haute horlogerie. This precision machine’s patented constant-force mechanism is integrated in a tourbillon and ensures that the amplitude of the balance remains almost constant. It guarantees an extremely precise rate over a period of at least 48 hours. The 94800-calibre basic movement features two barrels, which provide the energy for the higher torque required to drive the constant-force tourbillon. It also provides the moon phase module with the necessary power. The double moon display depicts the surface of the earth’s only natural satellite so realistically that even tiny craters can be recognized. The countdown scale shows the number of days remaining until the next full moon. The power reserve display between “4” and “5 o’clock” indicates the energy remaining in the mainspring. The design on the movement side, visible through the transparent sapphire-glass back, was inspired by a sports car’s engine block. Perforations provide a clear view of the intermeshing gears: performance engineering for purists.

Variations

Details

  • Reference IW590001
  • Case Material platinum and ceramics
  • Bracelet/Strap black alligator leather strap
  • Dial Colour black
  • Jewels 43
  • Calibre 94800
  • Price $290,000
  • Mechanical movement
  • Hand-wound
  • IWC-manufactured 94800 calibre (94000-calibre family)
  • 96-hour power reserve when fully wound
  • Power reserve display
  • Perpetual moon phase display
  • Double moon phases for the northern and southern hemispheres
  • Countdown display showing phases until next full moon
  • Tourbillon with integrated constant-force mechanism
  • Screw-in crown
  • Sapphire glass, flat, antireflective coating on both sides
  • See-through sapphire-glass back
  • Water-resistant 12 bar
  • Case height 14 mm
  • Diameter 46 mm

Watch Viewer

  • IW590001 Watch Front
  • IW590001 Watch Back

Enlarge

Constant-​Force Tourbillon

For the new Ingenieur Constant-Force Tourbillon, IWC has integrated a patented constant-force mechanism into a tourbillon. It ensures that the amplitude of the balance – and thus the watch’s accuracy – remain absolutely constant, initially by disconnecting the escapement from the direct flow of energy generated by the gear train. The energy is stored temporarily in the balance spring from where it is transferred to the escape wheel. In the process, the balance spring is put under tension once a second and the seconds hand in the tourbillon advances in one-second jumps. This ensures an extremely regular and precise rate over a period of at least 48 hours. After approximately two days, the movement switches from constant-force mode to normal mode, as can be seen from the second hand, which now starts to advance at intervals of one-fifth of a second.

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