Chapter II · 2025

Legacy Moonphase — Ice Blue

Automatic Chronograph · Moonphase · Pointer Date

Limited edition — 50 pieces

Ref. EK-CHR12 IB

Legacy Moonphase — Ice Blue — front view

Glacial blues, satin-finished in vertical bands — the colour of a morning lake under high cloud, fractured by light.

Drawing on its rich heritage, Edouard Koehn brings back the moonphase display — a complication already present in the Maison's historical pocket watches. The new Legacy Moonphase chronograph keeps the classic codes of the Legacy collection, harmoniously integrating the moonphase and pointer-date with the chronograph.

The movement, developed exclusively with Manufacture Concepto, pays tribute to master watchmaker Edouard Koehn (1839–1908), renowned for his expertise of this complication. The instantaneous 30-minute counter sits at 3 o'clock, while the red central chronograph seconds is engaged by the pusher at 2. The pusher at 4 resets the chronograph. The pointer date and the moon-disc share the counter at 6.

The moonphase indication tracks the principal phases of our satellite — a lunation of 29 days, 12 hours, 44 minutes and 2.9 seconds, rounded to 29.5 days. The disc is driven by a 59-tooth wheel advancing one notch every two days, mirroring the lunar cycle with precision.

This piece

Dial: Ice blue, vertical satin finish
Strap: Blue alligator with matching lining
Reference: EK-CHR12 IB

Request Private Appointment Enquire by Email

Also available

Legacy Moonphase Chronograph - US Only

EK-CHR12 SS

Sand

EK-CHR12 SN

Ed. Koehn pocket watch with perpetual calendar and moon phases, circa 1900

L'original · circa 1900

The moonphase, a Koehn signature.

Ed. Koehn pocket watch, “Chronomètre 1ère Qualité”, No. 64340. Made circa 1900 in 18K yellow gold, with perpetual calendar, moon phases and lunar calendar. The Legacy Moonphase is engineered around the dial architecture of that very piece.

Caliber EK-CHR12

Technical specifications

Reference family: EK-CHR12
Movement: Concepto-base self-winding chronograph, exclusively modified for Edouard Koehn
Frequency: 28,800 vph (4 Hz) · 261 components · 25 jewels
Power Reserve: 60 hours
Regulating organ: “Top” chronometer quality
Functions: Hours · minutes · small seconds at 9 · pointer date and moonphase in the counter at 6
Chronograph: Central seconds · instantaneous 30-minute counter at 3
Case: 316L stainless steel
Diameter: 40.0 mm
Height: 12.90 mm (sans glass-box) · 14.10 mm with sapphire
Crystal: Domed double-AR sapphire, glass-box · sapphire case back
Water Resistance: 50 metres
Strap: Louisiana alligator with alligator-flank lining · folding steel buckle
Edition: Purple: 10 pieces · Sand and Ice Blue: 50 pieces each