Heritage Chronograph Atelier 324.551 ‘Coquille d’oeuf’
A Swiss Made chronograph with a fully handcrafted Grand Feu enamel dial. Limited to just 25 pieces per year, and available exclusively by souscription.
Each Coquille d’œuf chronograph is delivered with a unique booklet and certificate, commemorating its artisanal journey — from dial shaping and enamel firing to final assembly.
The enamel dial features a vintage-inspired pulsation scale, adding a subtle functional detail rooted in the heritage of medical chronographs.
€ 9800
DESCRIPTION
Crafted in the tradition of fine Swiss watchmaking, the Heritage Chronograph – Coquille d’œuf marks the beginning of a new chapter for Lebois & Co.
This limited-edition timepiece features a rare, fully handcrafted Swiss Made Grand Feu enamel dial — composed of three separate parts, layered and fired at over 800 °C. The curved, multi-level surface is printed by hand using enamel-based inks, then fired once more to permanently fuse the graphics into the enamel.
Each dial is produced in Le Locle, Switzerland, by Donzé Cadrans — one of the world’s most respected enamel specialists — using time-honoured techniques passed down through generations. The result: a radiant, living surface with organic variations. No two dials are exactly alike.
To match the artistry of the dial, the Heritage Chronograph is housed in a refined 39 mm case and powered by a high-grade manual-wind chronograph movement. The subdials are recessed and soldered individually — a nod to the dial’s three-part construction.
Available exclusively by souscription, and limited to just 25 pieces per year, this model opens a new era for the Heritage Chronograph collection — and celebrates the 90th anniversary of Lebois & Co, founded in 1934.
SPECIFICATIONS
MATERIAL
DIAMETER
THICKNESS
CASEBACK
CRYSTALS
LUG-TO-LUG
LUG WIDTH
WATER RESISTANCE
316L STAINLESS STEEL
39 MM
10,9 MM / 14,3 MM
SCREWED DOWN
DOUBLE DOMED SAPPHIRE
47,35 MM
20 MM
5 ATM / 50 M
MOVEMENT
CALIBER
TYPE
WINDING
CHRONOGRAPH
POWER RESERVE
VIBRATIONS
JEWELS
LC-450
MECHANICAL
HAND-WOUND
COLUMN-WHEEL
60 HOURS
28,800 VPH
23
A Journey into Enamel
Behind every enamel dial lies a process shaped by patience, fire, and unforgiving precision. From raw copper to luminous Grand Feu, this photo series documents each stage of the creation — revealing what it truly takes to transform elemental materials into a timeless watch dial. Each step is handcrafted in Switzerland by master artisans. No shortcuts. No second chances. Only the flawless remain.
The base takes shape
A thin copper disc is cut and formed to match the dial’s exact curvature. This blank will carry not only layers of enamel, but the weight of precision.
Anchored by hand
Two small copper feet are manually pinned and soldered in place. They allow the finished dial to mount perfectly to the movement — misalignment is not an option.
Purified by hand
The raw enamel powder — made from crushed mineral glass — is ground and washed in water to remove impurities. This slow, tactile process ensures a clean, even surface after firing.
The first coat
A thin layer of enamel is applied to both sides of the dial. This isn’t aesthetic — it balances internal tension during firing. Enamelling on both sides is essential for stability.
Fired at 800°C
The dial enters the kiln. At this stage, it's just enamel powder on copper — but under intense heat, glass begins to fuse, and the surface gains depth. Most dials don't survive the first few firings.
Printed, layer by layer
Each color is pad-printed one by one, aligned with extreme precision. On a curved enamel surface, any shift — even a fraction — means the dial must be scrapped.
Three parts, one dial
This dial isn’t a single piece. The subdials are produced separately, then set into place and filed flush. The result: perfect integration, made invisible by skill.
Only the flawless remain
After the final firing, each dial is checked under magnification and projection. Print tension, shape, and enamel consistency must be perfect — or it's rejected.
The final surface
The result: a luminous, tension-free dial, deep in tone and rich in character. From copper to color, every step leaves its mark — even the invisible ones.
By reservation only
This timepiece will be offered by souscription — a traditional model in fine watchmaking. Each piece is made to order and limited to just 25 units per year.
