GRAND PLANETARIUM ECCENTRIC SI14
The First Watch to Display All Eight Planets
The Grand Planetarium Eccentric Si14 is widely considered one of the most complex astronomical wristwatches ever created.
It is the only mechanical wristwatch capable of displaying the real-time orbits of all eight planets — from Mercury to Neptune — directly on the dial. 1
Each planet moves according to its actual orbital period, transforming the watch into a living mechanical model of the solar system.
This is not timekeeping — it is cosmic simulation.
Real Orbital Time, Not Approximation
Unlike decorative complications, this watch follows astronomical accuracy:
• Mercury: 87.97 days • Earth: 365.24 days • Jupiter: 11.86 years • Neptune: 164.80 years
Every planet moves in real time, meaning some indications evolve over decades or even centuries. 2
Silicium Dial: A Living Galaxy
One of the most striking features is its oxidized silicon (Si14) dial.
Constructed from multiple silicon layers, it reflects shifting blue and violet tones — mimicking deep space.
Hand-painted Super-LumiNova planets glow in the dark, creating a miniature galaxy on your wrist. 3
Day: science Night: poetry
Case & Engineering: Built Like a Tool
The 44mm case is made from hardened stainless steel with a surface hardness of approximately 1,200 Vickers — nearly ceramic-level durability. 4
Despite its artistic nature, this is still a highly engineered object.
Movement: Mechanical Universe
Inside beats an in-house automatic movement with:
• 60-hour power reserve • 3Hz frequency • free-sprung balance • astronomical module on top
The movement architecture features star-shaped bridges and a gold rotor inspired by the sun.
Ultra Limited: Only 6 Pieces
This edition is limited to just six pieces worldwide, making it one of the rarest modern haute horlogerie creations.
Retail price is approximately €157,000 before taxes. 5
Not collectible — museum-level.
Why This Watch Matters
This piece represents a completely different philosophy of watchmaking:
• Not for utility • Not for status • But for intellectual and emotional impact
It shifts perspective — from human time to cosmic time.
Conclusion: The Peak of Astronomical Watchmaking
The Grand Planetarium Eccentric Si14 is not just a watch.
It is:
• a scientific instrument • a mechanical sculpture • a philosophical object
In a world obsessed with speed, this watch reminds you how vast time really is.