Atelier Chronograph 324.552 ‘Bleu sur Blanc’
A crisp dialogue of blue on warm white Grand Feu enamel. The Heritage Atelier Chronograph ‘Bleu sur Blanc’ (ref. 324.552) pairs a luminous, handcrafted enamel dial with deep blue registers and a vintage-inspired decimal scale for intuitive timing. A craft-forward chronograph defined by restraint, texture, and precision.
Produced in limited numbers in 2026 only, subject to availability. Delivery from October 2026. Deliveries will be scheduled in the order in which confirmed orders are received.
€ 9800
DESCRIPTION
In Atelier, Lebois & Co explores the craft-forward side of the Heritage collection: smaller-batch creations where dial artistry leads the story. The Heritage Atelier Chronograph ‘Bleu sur Blanc’ (ref. 324.552) is built around a rare centerpiece: a Swiss Made Grand Feu enamel dial, fired at high temperature to achieve a surface that feels alive, subtly warm, never flat, and constantly shifting with the light. Executed in a three-piece construction with a gently domed enamel main surface, it adds depth that only reveals itself up close.
The palette is deliberately pure. A soft off-white enamel base, positioned between the eggshell nuance of Coquille d’œuf and the brighter white character of earlier enamel executions, sets the stage for deep blue registers that bring contrast, depth, and legibility without breaking the calm. It is “blue on white” in the most literal sense, yet unmistakably Atelier: quiet refinement with collector-grade detail.
Instead of a tachymeter or telemeter, the 324.552 features a decimal scale, a classic, functional choice rooted in mid-century tool chronographs and designed to translate time into decimals. The minute is divided into 100 units around the dial, allowing readings to the hundredth of a minute. It is timing made clear: precise, readable, and purpose-driven.
The result is a chronograph that is not about loud reinvention, but about finish, proportion, and nuance, a watch that rewards a second look, and then a third. This is the Atelier philosophy distilled: traditional technique, modern discipline, and a dial that can only be made by hand.
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 colour is applied individually using enamel-based inks, pad-printed with extreme precision onto the curved surface of the dial. Once printed, the dial returns to the kiln, where the graphics are fired at high temperature to permanently fuse them into the enamel itself.
On such a multi-level, curved enamel surface, any misalignment — even a fraction — means the dial must be rejected.
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.
Availability
This timepiece will be offered via pre-order, produced in limited numbers in 2026 only, subject to availability. Orders open 14 April.
