Chapter I · 2025

Legacy Rattrapante

Split-Seconds Chronograph · Grand-Feu White Enamel

Édition limitée — 50 pièces

A faithful renaissance of the rattrapante chronograph that defined the Maison at the turn of the twentieth century. The dial layout — instantaneous 60-minute counter at 12, small seconds at 6 — reproduces the architecture of the original Ed. Koehn pocket chronograph from the early 1900s.

The red central seconds is engaged by the pusher at 2 o’clock; the blue split-seconds hand is governed by a coaxial pusher integrated into the crown — an engineering signature of the Maison’s movement team.

Born of a close collaboration with 10Ten Labs, exclusive distributor for Bahrain and Saudi Arabia.

Specifications

Reference: EK-CHR11SS-SL-WEEL-ASBK
Movement: Concepto-base automatic, exclusively modified for Edouard Koehn
Frequency: 28,800 vph (4 Hz) · 282 components
Jewels: 31 — “Top” chronometer regulating organ
Power Reserve: 48 hours
Functions: Hours, minutes, small seconds at 6 · split-seconds chronograph · 60-minute counter at 12
Case: 316L stainless steel · coaxial pusher crown for the rattrapante
Diameter: 40.0 mm
Height: 13.10 mm (sans glass-box) · 14.60 mm with sapphire
Crystal: Domed double-AR sapphire, glass-box · sapphire case back
Water Resistance: 50 metres
Dial: Grand-feu white enamel — inspired by the original 1900s pocket watch
Strap: Louisiana alligator with alligator-flank lining
Clasp: Steel folding clasp · pin buckle on request
Edition: Limited to 50 numbered pieces in 316L steel

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Ed. Koehn split-seconds chronograph pocket watch, circa 1900

L’original · circa 1900

A pocket chronograph, re-translated.

The Legacy Rattrapante is engineered around the dial geometry of an Ed. Koehn split-seconds pocket chronograph from the early 1900s — the very complication that made the master watchmaker’s name among connoisseurs of haute horlogerie.

L’art de l’émail

Grand-feu enamel, fired at 840°C.

Enamelling consists in applying meticulously prepared enamel powder onto the dial’s base plate and fusing the two by firing at 840 degrees Centigrade. The intense heat is what gives this technique its name — grand feu. A craft practised by watchmakers since the fifteenth century, with roots reaching into Antiquity.

Applying enamel powder onto the dial base plate — Application of the enamel powder onto the enamelled base plate of the dial

Stamping the markings onto the enamel dial — Transferring the markings onto the dial

La Chaux-de-Fonds, Suisse — septembre 2024