Artisans de Genève × Eliud Kipchoge: 57g Titalum Chronograph

At a glance

• The bespoke mid-case is made from Titalum, an aluminum-titanium alloy, bringing the watch’s weight to 57 grams.
• The original automatic caliber 4130 was re-engineered, skeletonized and stripped of its rotor to reduce weight and thickness; it is hand-wound and runs at 4Hz with a three-day power reserve.
• A transparent sapphire crystal dial and bezel reveal the movement. White, red and green details reference Kenya, and the central chronograph hand is shaped like a lightning bolt.