








LÉON 12H - SILVER AND BROWN
🔥 €10 OFF YOUR SECOND BRACELET!
Discover our collection of interchangeable straps. In leather, canvas or steel, you will definitely find the perfect strap to change the look of your watch.
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SPECIFICATIONS
- 316L Stainless Steel Case
- Diameter: 38mm
- Double-domed Sapphire Crystal
- Water Resistance: 5 ATM
- Miyota 9015 Automatic Movement
- Power Reserve: 42 Hours
FREE DELIVERY
HAND-ASSEMBLED IN FRANCE
2-YEAR WARRANTY
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Between Science and Elegance
The Léon collection pays tribute to the ingenuity of Léon Foucault, the man who made the world turn… literally. Inspired by his famous pendulum designed to demonstrate the Earth’s rotation, this creation translates the quest for balance and precision so dear to watchmaking.
With pure lines, a play on contrasting finishes, and a design in constant motion, Léon embodies the dialogue between science and elegance.






« Inertie » : A symbol of mastered ttime
The dial of the Léon collection makes the movement of time visible. Its applied half-sphere markers evoke the trajectory of the pendulum, oscillating with precision and regularity. The lacquered surface, available in gradient brown or gradient gray, shifts in intensity depending on the angle of the light.
At 6 o'clock, the word "Inertie" (Inertia) serves as a reminder of the very principle that links the watch to the pendulum: a subtle balance between the science of time and its poetry.
The dauphine hands and applied markers are enhanced with Super-Luminova, offering an elegant reading of time, even in total darkness.

The engine of the world
At the heart of the Léon collection beats the Miyota 9015 automatic caliber, renowned for its reliability and slim profile. With its 42-hour power reserve, it keeps pace with time through unwavering consistency and regularity.
The exhibition caseback reveals the engraved oscillating weight, paying tribute to the genius of Léon Foucault and his legendary Pendulum.
SPECIFICATIONS

CASE
- 316L Stainless Steel
- Diameter: 38mm
- Thickness: 11.05mm
- Water Resistance: 5 ATM
- Double-domed Sapphire Crystal

DIAL
- Hours - Minutes - Seconds
- Lacquered Brown Dial
- Gold-plated Applied Markers with Super-Lum

MOVEMENT
- Miyota 9015 Automatic Caliber
- Power Reserve: 42 Hours
- Accuracy: ~20 seconds / day
- Engraved Rotor
- Engraved Caseback - Sapphire Crystal
NEED HELP
FAQ
Free shipping within France is included on all orders, with no minimum purchase required. Delivery typically takes 48 to 72 hours.
For European residents, standard shipping via Colissimo is €4.90. We are pleased to offer free delivery on all orders over €500.
For International shipping, we use Chronopost at a standard rate of €9.90. Delivery times for international orders vary between 2 to 10 business days, depending on the destination address.
Thanks to the quick-release spring bar system, you can change your bracelet in less than ten seconds without any tools. Please ensure that the part of the bracelet with the buckle is attached to the top of the watch, at the 12 o'clock position.
At GUSTAVE & Cie, we believe there is no such thing as an 'ideal' watch size. However, if your wrist measures less than 15cm, we highly recommend choosing a 36mm case. Conversely, if your wrist measures more than 18cm, we suggest a 40mm case.












