Edouard Koehn expands its Legacy Rattrapante collection with the Four Seasons, a series of limited-edition split-seconds chronographs distinguished by four guilloché dial executions inspired by the changing landscapes of Switzerland throughout the year.
Produced in editions of 25 pieces per dial colour, the new models combine one of traditional watchmaking’s most sophisticated complications with decorative craftsmanship rooted in centuries-old techniques.
Regarded as one of the most demanding chronograph mechanisms to engineer and assemble, the rattrapante, or split-seconds chronograph, is displayed through a central chronograph seconds hand working in conjunction with a contrasting blue split-seconds hand, allowing the measurement of intermediate times.
The chronograph is paired with an instantaneous 60-minute counter and controlled via a coaxial pusher integrated into the crown. The Legacy Rattrapante faithfully reproduces the layout used in a split-seconds pocket watch produced by the brand in the early 1900s.
While the mechanics of this model remain unchanged compared to to the version with Grand Feu enamel dial that we reviewed here, the Four Seasons series introduces new dial treatments that place particular emphasis on guilloché decoration.
Protected by a raised anti-reflective sapphire crystal, the main dial surface features a sunray guilloché pattern, while the two sub-dials are decorated with a Clous de Paris motif. Multiple layers of lacquer enhance the depth of the engraving and create varying visual effects depending on the chosen colour.
The Spring edition is characterised by a violet dial inspired by the first flowers that emerge after winter. Its rich tone is paired with an anthracite alligator leather strap.
The Summer model adopts a light blue dial recalling the reflections of Swiss lakes under bright sunlight, complemented by a dark blue alligator strap.
For Autumn, Edouard Koehn has selected a warm tobacco-brown shade inspired by the forests and landscapes of the Jura region, matched to a brown alligator strap.
Finally, the Winter version features a deep midnight-blue dial whose colour appears almost black in certain lighting conditions, combined with a navy-blue strap.
The polished stainless steel case measures 40 mm in diameter and 13.1 mm in thickness, increasing to 14.6 mm including the box-shaped sapphire crystal. Water resistance is rated to 50 metres / 165 feet.
Visible through the transparent sapphire crystal, the watch is powered by a self-winding split-seconds chronograph movement developed on a Manufacture Concepto base. Comprising 282 components and 31 jewels, this calibre operates at a frequency of 28,800 vibrations per hour (4 Hz) and provides a power reserve of 48 hours.
In addition to the chronograph functions, it displays the hours, minutes and small seconds, while a tachymeter scale around the dial adds a further timing function.
The Edouard Koehn Legacy Rattrapante Four Seasons is available through authorised retailers and directly from the manufacture in La Chaux-de-Fonds.
Each version is limited to 25 individually numbered pieces and priced at CHF 13,600. edouardkoehn.com
