The latest incarnation of the model that first appeared in 1980 combines the complexity of a ceramic case with the apparent purity of the slim baguette movement of the Golden Bridge.

The air of lightness and transparency that pervades the Golden Bridge model in ceramic belies the difficulty of producing a case in ceramic (which must be fired at a precise temperature for a precise time to achieve the 34x51mm case size required) and the complexity of Corum’s famous Golden Bridge movement.

The CO113 movement has become an icon in the Swiss watchmaking industry thanks to its unique linear design, which posed its own challenges in terms of construction. Its slipping-spring winding system avoids forcing the mechanism, while a specific coupling clutch has been developed to separate winding from time-setting by means of an ingenious architecture in which the wheels and pinions are mounted between the mainplate and the bridge.

CERAMIC GOLDEN BRIDGE by Corum

Rather than a classic index- or regulator-type system, the calibre is equipped with a variable-inertia balance guaranteeing excellent long-term accuracy and features two pillars visible on the bridges and ensuring enhanced resistance and rigidity – and thus greater precision. The CO113 calibre operates at a frequency of 4Hz (28,800 vibrations per hour) and has a 40-hour power reserve.

The movement is visible through 360° thanks to four sapphire crystals housed in the front, back and both sides of the ceramic case.

The 5N 18-carat red-gold upper bridge bears the hand-engraved Corum signature, surrounded by a slender scrolling motif depicting the three types of fern that grown in the forests of La Chaux-de-Fonds, the region where the Golden Bridge sprang to life. The red-gold mainplate is also adorned with hand engravings embodying the finest watchmaking traditions. An alligator leather strap fitted with a black PVD-coated pin buckle sets the finishing touch.