Greubel Forsey makes their popular (relatively) GMT model by exchanging the regular inclined tourbillon for a quadruple tourbillon. How about that – four tourbillons orbiting the globe. Introducing the Greubel Forsey GMT Quadruple Tourbillon.
Robert Greubel and Stephen Forsey unites their second Fundamental Invention, the Quadruple Tourbillon, with their ground breaking interpretation of the GMT with its outsized rotating globe. Displaying three time zones along with a universal time function, this exceptional timepiece is distinguished by its three-dimensional architecture created with extreme attention to fine craftsmanship. A Unique edition of 66 pieces in total, the first 11 of which are in white gold.
Greubel Forsey GMT Quadruple Tourbillon
In bringing the Quadruple Tourbillon and the GMT mechanisms together, Greubel Forsey not only accomplished a major technical feat that led to the creation of a new hand-wound calibre comprising 805 parts, including three fast-rotating barrels.
Greubel Forsey tackled this challenge from an architectural angle to create a timepiece in which the three-dimensional approach is expressed on many levels.
The main hours/minutes dial between 1 and 2 o’clock forms the highest point of the dial, where it is underlined by the subtle asymmetry of the case and complemented by a 72-hour chronometric power-reserve display. The next level is it at 4 o’clock, with the coaxial small seconds and second time zone display which is adjustable in one-hour increments by means of a pusher. Located between 8 and 9 o’clock, observers can admire the spectacular sight of the Earth in motion, surrounded by a fixed 24 hours ring around the Equator and displaying local time for all the longitudes – simultaneously taking account of the day/night indicator (on respectively light/dark zones).
A lateral window in the asymmetrical section of the case provides a view of the Equator and the Southern hemisphere. The four tourbillons gravitate in two pairs on either side of the blue planet, each featuring an open and transparent construction, secured by flat black polished bridges and adorned with gold chatons as well as hand-polished bevelling and countersinks.
Universal time is visible through the case back, with a fixed 24-hour scale bearing day/night zones and a disk with three-letter abbreviations of 24 cities representing the various time zones.
This disk also distinguishes between the time zones that implement Summer Time (Daylight Saving Time) appearing in a light colour; and those that do not (shown on a dark backdrop). The case back also provides a chance to admire the Quadruple Tourbillon as well as frosted bridges with jewels set in gold chatons. The two complex asymmetrical convex sapphire crystals protecting the dial and case back also called for the utmost expertise.
This masterpiece of contemporary aesthetics comes in a unique edition of 66 pieces. The first edition of 11 of which are in white gold, numbered from 01/11 to 11/11 on a plate in the centre of the dial.