Girard-Perregaux has been defying gravity for 150 years by developing numerous complex watches featuring tourbillons. Now the manufacturer demonstrates once again its mastery of high-precision movements with the Tri-Axial Planetarium. In this new watch, Girard-Perregaux combines a Tri-Axial tourbillon, a globe performing one full turn in 24 hours and an astronomical moon phase; technical expertise, an iconic design and traditional craftsmanship. The result can easily be described as work of art.
As we all know, a tourbillon is a device compensating for the effects of gravity on a mechanical watch, resulting in greater accuracy. This mechanism is as speciality of Girard-Perregaux, which developed with the Tri-Axial Tourbillon a particularly innovative and sophisticated version in 2014. It joined other previous interpretations such as the bi-axial tourbillon. As its name implies, this tourbillon is equipped with a regulator operating on three rotation axes instead of just one. The new, 140-part movement only weighs 1.24 gram and comprises an inner lyre-shaped carriage performing one rotation per minute. It is fitted inside a structure spinning on a second axis in 30-second cycles. Both are in turn incorporated within a third structure revolving once every two minutes on yet another axis. The result is a mesmerising choreography entirely dedicated to conquering precision.
Two astronomical complications joint the dance of the tourbillon. The globe with its 24-hour-rotation provides an instant reading of the time around the world. Set to 12 o’clock (noon), the arrow indicator positioned at the base of the 13 mm-diameter aluminium sphere serves to show where it is daytime on the dial side, and where it is night-time, on the back. The lunar disc beautifully matches the blue shades of the rotating globe and reproduces the moon as we see it. Equipped with a precision mechanism, the astronomical moon-phase indicator requires adjustment only once every 122 years.
The guilloché silver-toned dial bears a motif evoking Earth’s meridians and is punctuated by pink gold numerals and hour-markers swept over by dauphine-type hands.
A transparent case-back and a side opening in the case ensure a perfect view of the complex mechanism inside and drawing attention to every detail. Arrow-shaped bridges, a lyre-shaped tourbillon carriage and the the three-part sapphire crystal with its two domes are literally flooded it with light.
The Girard-Perregaux Tri-Axial Planetarium is equipped with a 48-diameter pink gold case which is endowed with all the attributes of Fine Watchmaking: an imposing curved middle, a bevelled bezel and cambered lugs. It is water-resistant to 30 meters.
This watch is equipped with the hand-winding Manufacture GP09310-0001 calibre ensuring a 60-hour power reserve. The movement drives the Planetarium with Tri-Axial tourbillon as well as hours, minutes, moon-phase and day/night functions and works at a frequency of 3 Hz.
The Girard-Perregaux Tri-Axial Planetarium is completed by a leather strap and is limited to 15 pieces only.