The Tri-Axial tourbillon Planetarium timepiece by Girard-Perregaux houses a sophisticated tourbillon complication and two captivating, delicately miniature-painted complications: a rotating globe with day/night indication and a precision moon-phase display. The watches in this Fine Watchmaking bear the technical and aesthetic signature of the Swiss Manufacture. A complex structure revealed by an iconic and luminous design.
The three-dimensional Planetarium watch combines a Tri-Axial tourbillon, a globe performing one full turn in 24 hours and an astronomical moon phase. Cleverly combining technical expertise, iconic design and traditional craftsmanship, it distils the essence of the Girard-Perregaux DNA: arrow-shaped gold bridges, a lyre-shaped tourbillon carriage, sapphire domes and a side opening enabling light to flood into this superbly refined mechanism.
The Girard-Perregaux Tri-Axial Tourbillon was introduced in 2014. As its name implies, this high-speed tourbillon is equipped with a regulator operating on three rotation axes instead of just one. This featherweight 1.24-gram,140-part movement comprises an inner lyre-shaped carriage – a signature of the Maison since 1880 – 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 ever two minutes on yet another axis.
In addition to Tri-Axial Tourbillon, the new timepiece houses two astronomical complications. 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. Hand-crafted using the miniature painting technique, its cartography depicts the world as it was in 1791, the year the brand was created. The equally micro-painted lunar disc picks up the 17th century selenography at the time the telescope was invented, beautifully matching the blue shades of the rotating globe and reproducing the moon as we see it. Equipped with a precision mechanism, the astronomical moon-phase indicator requires adjustment only once every 122 years, by means of a dedicated corrector at 2 o’clock.
The 48 mm-diameter pink gold case is endowed with all the attributes of Girard-Perregaux Fine Watchmaking: an imposing curved case middle, a bevelled bezel and cambered lugs. Water-resistant to 30 metres, it is topped by a three-part sapphire crystal, with two domes providing space for the rotation of the tri-axial tourbillon and the globe. The transparent case-back and the side opening in the case ensure a perfect view of this complex mechanism, literally flooding it with light.
Equipped with hand-winding Manufacture GP09310-0001 calibre ensuring a 70-hour power reserve, the Planetarium with Tri-Axial tourbillon drives the hours, minutes, moon-phase and day/night functions. These indications are displayed on a guilloché silver-toned dial bearing a motif evoking Earth’s meridians and punctuated by pink gold numerals and hour-markers swept over by dauphine-type hands. This movement visible through the transparent screw-down back is adorned with meticulous hand-crafted finishing and the iconic signature characteristics of the Maison: arrow-shaped bridges, along with the engraved eagle symbol holding the brand insignia. The rear baseplate is sandblasted and black PVD-treated to accentuate the ‘night’ side of the day/night indicator, thus making a striking contrast with the silver-toned guilloché dial. The Planetarium Tri-Axial watch is fitted with a black alligator leather strap with a pink gold folding clasp.
Case and dial
Material: pink gold
Diameter: 48 mm
Thickness: 18.66 mm (21.52 mm including the domes)
Sapphire crystal: glare proofed with two domes to highlight the tourbillon and theglobe
Case-back: glare proofed sapphire crystal
Dial: silver-toned, guilloché
Hands: Dauphine-type hands
Water-resistance: 30 metres (3 ATM)
Reference: GP09310-0001, mechanical manual-winding movement
Diameter: 36.10 mm (16’’’)
Thickness: 16.87 mm
Frequency: 21,600 vph – (3 Hz)
Number of components: 386
Watch jewels: 42
Power reserve: min. 60 hours
Tri-Axial tourbillon, hours, minutes, moon-phase and day/night indicators
Tri-Axial Tourbillon Carriage
One complete revolution in two minutes
140 components, 1.24 grams
Material: hand-stitched black alligator leather
Clasp: pink gold triple folding clasp