Got time on your hands?

IWC Grande Complication

Posted by wristwatch on October 1, 2007

A total of 659 mechanical parts, 71 of them jewels, twelve patents and 21 functions and displays, including a perpetual calendar for the next 500 years, together with a perpetual moon phase display made of polished goldstone representing a star-studded night sky. Working inside the case are a chronograph and a highly complex minute repeater with an all-or-nothing piece slide. This wonderful invention chimes the time out the time in crystal-clear tones which are activated by the slide on the left-hand side on the case. Two tiny, precision-made hammers are released and chime the time in hours, quarters and minutes on two gongs. Developing the striking mechanism was a technical tour de force. Initially, the chimes were inaudible outside the solid platinum case, so the glass was freely suspended on a platinum membrane to enable it to amplify the vibrations produced by the gongs via the sound transmission pin. The case, too, finished in solid platinum with a fineness of 95 percent or 18 ct. yellow gold, is first class. Despite the complex design of the case, the Grande Complication is unaffected by superficial water splashes.

* Calibre: 79091
* Vibrations: 28 800/h / 4 Hz
* Jewels: 75
* Power reserve: 44 h
* Winding: automatic
* Production limited to 50 watches per year
* Mechanical movement
* Self-winding
* Chronograph
* Minute repeater
* Perpetual calendar
* Four-digit year display
* Perpetual moon phase display
* 659 mechanical parts
* Screw-in crown
* Crown-activated rapid calendar advance
* Convex sapphire glas
* Glass: sapphire, convex
* Crown: screwed
* Case diameter: 42.2 mm
* Case height: 16.3 mm
* Weight:
* Grande Complication in platinum with crocodile leather strap: 183 g
* Grande Complication in platinum with platinum bracelet: 390 g
* Grande Complication in 18 ct. yellow gold with crocodile leather strap: 166 g
* Grande Complication in 18 ct. yellow gold with 18 ct gold bracelet: 340 g



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