Greubel Forsey has introduced GMT Quadruple Tourbillon. This revolutionary and modern limited edition marks the start of a new chapter with new materials, new colours and new finishes.
The GMT Quadruple Tourbillon is radical in its structure. It aims to average out positional errors due to gravity in all situations, especially in stable wristwatch positions. To achieve this, the original tourbillon has been elevated to realise its full potential: inclined at 30°, doubled and then quadrupled.
The result, two synchronised Double Tourbillon 30° mechanisms, where a first cage, inclined at 30° and rotating in one minute, is nested within a second horizontal cage, completing a full rotation in four minutes. A spherical differential transmits the average timing rate of the four tourbillon cages, improving the overall chronometric performance of all the regulating organs.
In terms of design, Greubel Forsey offers an unexpected alternative to the precious metals that watchmaking world traditionally favours. The titanium timepiece offers a new, modern and dynamic feel on the wrist.
The 46.5mm titanium case comes as a result of a significant machining and hand finishing process. 72-hour chronometric power reserve indication appears brilliant in blue. The main plate is frosted. The model is water resistant up to 30 meters.
Planet Earth is located at eight o’clock. The rotating globe allows for the simultaneous display of several different time zones. There is a 24-hour ring around the Earth, for Day/Night indication.
The hand-wound movement made up with 705 parts includes 84 jewels and works at a frequency of 21,600vph. The mechanism has a power reserve of 72 hours. The complications of the model are GMT, rotating globe with universal time and day-and-night, universal time on 24 time zones, cities observing summer time, lateral window showing the equator and southern hemisphere, GMT pusher, Quadruple Tourbillon, hours, minutes, small seconds, and power-reserve indicator.
The model comes with rubber or hand-sewn alligator strap with a Titanium folding clasp.
The price of the model is $820,000.
Technical Specifications
| Brand | Greubel Forsey |
| Model | GMT Quadruple Tourbillon |
| Case Dimensions | 46,5mm |
| Case Material | Titanium |
| Dial | Multi-level in anthracite and blue colour; circular-grained with polished bevelling, blue treatment |
| Lume | Yes |
| Water Resistance | 30 meters |
| Strap / Bracelet | Rubber or hand-sewn alligator strap with a titanium folding clasp |
Movement Basics
| Caliber | |
| Functions | GMT, rotating globe with universal time and day-and-night, universal time on 24 time zones, cities observing summer time, lateral window showing the equator and southern hemisphere, GMT pusher, Quadruple Tourbillon, hours, minutes, small seconds, and power-reserve indicator |
| Caliber Dimensions | |
| Power Reserve | 72 hours |
| Winding | Hand-wound |
| Frequency | 21,600 |
Pricing
| Price | $820,000 |
| Limited | Yes |
