The art of engraving
The second dial, graced with an even more baroque-inspired aesthetic, is hand-engraved. The 12 signs of the zodiac intertwine and overlap on a white gold disc. The engraver has provided a wealth of ramolayé (pounced ornament) details, highlighting volumes in the material carved out by hand and lit up by the subtle interplay of slanting and depth effects.
The bulging muscles of Sagittarius or the flowing mane of Capricorn are outstandingly realistic when viewed under a magnifying glass. On the Earth-orbiting around a flaming gold Sun, the finesse of details has been pushed to extremes: the oceans are covered with microscope waves achieved by engraving effects, while the contrasting continents are polished to accentuate the luminosity of the gold. An expression of truly exceptional craftsmanship.
Laser engraving meets hand-engraving on sapphire crystal
The third dial is adorned with decorative techniques involving several novel aspects. To accompany this dance of Earth and Sun, the zodiac signs are complemented by a 3D-effect star-studded sky. The Earth is hand-engraved and picks up this contrast between the fine graining of the ocean waves and the brilliant glow of the continents. A hand-painted midnight blue under dial is overlaid with a transparent sapphire crystal engraved on its back. Vacheron Constantin has used the innovative laser technique to sculpt the symbols. The engraver then works them over entirely by hand so as to accentuate the raised motifs and play with the opalescent effects of sapphire. On the front, the constellations are laser-engraved and then highlighted with Super-Luminova®. The captivating sight of the sky chart echoing the immensity of the night sky is thus fully revealed in the semi-darkness.
An original display embodying a technical feat
These Hallmark of Geneva certified timepieces driven by a mechanical self-winding Manufacture made movement, calibre 2460 RT. Entirely designed, developed and created by Vacheron Constantin in a three-year process, it provides the possibility of staging the fascinating view of the sky reproducing the heliocentric system. The time is displayed by two triangular peripheral hands in 4N gold – a cut-out one for the hours and a solid one for the minutes – that glide around the dial rim. These pointers are driven by large dedicated wheels positioned on the outer part of the calibre.
The elliptical path of the Earth around the Sun is a key highlight of this watch, exuding a powerful presence and providing continuous information as the days go by. The first complication takes the form of the Earth that spins on its axis in a 24-hour rotation period, corresponding to a mean solar day. The second complication achieved by means of a ‘tropical’ gear train is the Earth’s elliptical orbit around the Sun in 365.2421898 days, meaning one tropical year. An extremely precise mechanism, since the device operating this realistic motion of the Earth requires a one-day correction only once in 8,000 years – an eternity! This degree of precision for such a complication is a means by which the Maison testifies to its commitment to developing new movements. A tour de force serving as a timely reminder that the Manufacture has consistently demonstrated this capacity for innovation in terms of analogue time display, guided by its mastery of horological engineering as well as its creative boldness cultivated across more than 260 years.
Well-mastered details
The gold oscillating weight appearing on the back of the watch and protected by a sapphire crystal features an engraving on the same theme: a radiant Sun surrounded by ellipses. This 352-part self-winding calibre has a 36–hour power reserve. The perfectly mastered finishing operations are entirely crafted by hand in accordance with traditional watchmaking methods.
Twelve stylised zodiac signs are engraved around the rim of the 43 mm-diameter bezel. To ensure optimal convenience, all functions – the hours, the minutes, as well as the two motions performed by the Earth – are adjusted via the crown. The three models are fitted with a Mississippiensis alligator leather strap secured by a gold buckle. They are delivered in a precious presentation wood box containing a magnifying glass providing a chance to admire in detail the finesse of the artistic work accomplished on these creations.
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