The Basics

IWC introduced its first ‘Grande Complication’ wristwatch at the 1990 Basel watch fair. Building upon the platform that Kurt Klaus’ perpetual calendar module had provided them, IWC went ahead and added a minute repeater to the already complex movement. The case measured 42.2mm across at a height of 16.3mm, making it of considerable size – especially at the time of introduction. Reference IW9270-20 is part of the second generation of Grande Complication’s, being distinguished by the updated dial design and ‘dauphine’ hands.

Brand: IWC
Family: Grande Complication
Reference: IW9270-20
Name: Grande Complication 3770 Platinum / Black / English / Bracelet
Produced: 1993 – 2010
Limited: No

Below is a detailed look at IWC’s model IW9270-20 from Grande Complication watch family, including the price, case details and movement features.

IWC Grande Complication IW9270-20

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The Details

IWC’s Grande Complication 3770 Platinum / Black / English / Bracelet (IW9270-20) was originally released in 1993 – 2010. This watch features a automatic movement beating at a frequency of 28800 bph (4 Hz) to provide a 44-hour power reserve when fully wound.

The Case

The platinum case measures 42.2mm in diameter and roughly 16.3mm thick. The round case is paired with a black color dial with dauphine-shaped hands, and a stick / dot hour markers and minute track, covered by a sapphire glass. IWC’s Grande Complication model IW9270-20 is water resistant up to 10 meters (33 ft). A solid caseback is over the back of the watch case.

Material: Platinum
Glass: Sapphire
Back: Solid
Shape: Round
Diameter: 42.2mm
Height: 16.3mm
Lug Width: N/Amm
W/R: 10

Case Diameter

Case Thickness

Lug Width

Water Resistance

The Movement

The Grande Complication IW9270-20 movement is a powered by caliber 79091 made by IWC. The 75-jewel automatic movement is mm in diameter. Its balance wheel oscillates at 28800 semi-oscillations per hour or 4 Hz. This movement offers a 44-hour power reserve.

Type: Automatic
Brand: IWC
Caliber: 79091
Base: ETA 7750
Display: Analog
Diameter: mm
Jewels: 75
Reserve: 44 hours
Frequency: 28800 bph
Time: Hours, Minutes, Small Seconds
Chronograph: Chronograph

The Price

How much does the IWC’s Grande Complication IW9270-20 cost? This watch was introduced in 1993 and has been in IWC’s collection for around . This watch is not a limited release. As with most luxury watches, the price of depends on the availability and demand.

CURRENT PRICE: Not Available

For more information, visit IWC online.


  • Brand: IWC
  • Model: Grande Complication 3770 Platinum / Black / English / Bracelet
  • Reference Number: IW9270-20
  • Limited: No

Case & Dial:

  • Material: Platinum
  • Glass: Sapphire
  • Back: Solid
  • Diameter: 42.2
  • Thickness: 16.3
  • Lug Width: N/A
  • Dial Color: Black
  • Indexes: Stick / Dot and Dauphine-shaped hands
  • Water Resistance: 10 meters


  • Winding: Automatic
  • Brand: IWC
  • Caliber: 79091
  • Display: Analog
  • Diameter: mm
  • Jewels: 75
  • Power Reserve: 44 hours
  • Frequency: 28800 bph
  • Functions: Hours, Minutes, Small Seconds

About IWC

IWC logo

IWC is based in Schaffhausen, Switzerland, and was founded in 1868. Its signature lines are the Pilot’s Watches and the Portugieser, while other famous collections are the Aquatimer, Portofino and the Da Vinci. Many of IWC’s designs display a industrial type of beauty not often found in Swiss watchmaking. The same goes for its movements; while of very high standards, they are finished with an … engineers touch rather than that of an artist. One could very well say that IWC’s approach to watchmaking is more German in nature compared to many of its competitors; the ‘form follows function’ adagio is one held in high esteem in Schaffhausen. Notable watches and innovations created by IWC in the past include the digital ‘Pallweber’ pocket watch, the late 1930’s Portugieser, the 1985 Da Vinci with Kurt Klaus perpetual module, the split-seconds mechanism as designed by Richard Habring and the ceramic Da Vinci and Flieger 3705 – introduced many years before the material became fashionable. IWC also pioneered the use of titanium in wristwatches. In recent years, IWC has had a strong focus on in-house movements with prices rising accordingly. IWC is part of the Richemont group.

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