Time is rarely questioned in watchmaking. It turns, it returns, it repeats. Circular dials have conditioned us to accept time as something that comes back on itself.
In 2009, URWERK chose a different position. One that aligned less with mechanical convenience and more with human experience.
The UR-CC1 King Cobra was unveiled in Geneva in September 2009, not as a stylistic experiment, but as a philosophical statement. Time does not move in circles. It advances. It leaves traces. It never returns to where it began.
The Question That Would Not Go Away: Why do we think of time as a straight line, yet display it as a circle?
This contradiction sits at the core of the UR-CC1. While circular indications dominate horology for practical reasons, they conflict with how we intuitively understand time. We mark our lives from the past to the present to the future. A line, not a loop.
The UR-CC1 set out to reconcile this disconnect, not visually, but mechanically.
A Forgotten Prototype
The roots of the King Cobra trace back to the late 1950s, when designer Gilbert Albert and watchmaker Louis Cottier collaborated on a radical concept for Patek Philippe.
Cottier, a discreet yet highly inventive Swiss watchmaker, left a profound mark on modern horology through technically daring solutions. Among his most enduring contributions is the practical 24-hour world time system, a concept that continues to underpin world time watches across the industry today. Across his career, he developed more than 455 calibres, with the Cobra standing out as one of his most intriguing and unconventional creations.
At a time shaped by Henri Stern’s vision (Thierry Stern’s grandfather). As an individual with a strong artistic instinct, Stern encouraged creative exploration, creating the conditions in which alternative interpretations of time could be seriously considered.
The prototype, known simply as The Cobra, featured a linear time display, unprecedented then and still rare today. Despite a patent filed by Cottier in 1959, the watch never entered production. It survived as a single object, archived, unresolved.
Decades later, that prototype became URWERK’s muse.
From Sketch to Commitment
In 1998, Martin Frei sketched an early linear time display concept. It was set aside as URWERK focused on developing its satellite hour system. Yet the idea remained active in the background.
By the mid 2000s, URWERK had the technical maturity to return to it. The decisive spark came not from horology, but from automotive design. In the end, it is the Alfred Hitchcock film “The Birds” that gives Felix the decisive nudge in the right direction. In one of the most famous scenes from the film, the heroine seeks refuge in an old Dodge car. The image lasts only a few seconds, but it is crucial – a close-up of the dashboard and its linear speedometer.
Time should travel forward, visibly.
Linear by Design
URWERK’s “King Cobra” is titled the UR-CC1. ‘CC’ for Cottier Cobra, a homage to the genius of Louis Cottier, inventor and creator. Once more, URWERK redefined our vision of fine watchmaking and pushed back the frontiers of the possible.
The UR-CC1 displays time across two horizontal cylinders.
The upper cylinder indicates minutes. The lower cylinder displays hours. Both progress from left to right across a fixed scale.
Minutes advance continuously until reaching sixty. At that moment, the minute cylinder snaps back to zero in one tenth of a second (a retrograde action, where an indicator quickly returns to its starting position). This retrograde return simultaneously triggers the hour cylinder to jump forward by one hour.
There is no rotation disguised as movement. Only progression, interruption, and consequence.
Making a Straight Line Possible
Linear displays are mechanically unforgiving. Rotational systems distribute energy evenly. Linear systems demand precise control of acceleration, deceleration, and instantaneous reversal.
The UR-CC1 required over three years of development and a full year of testing before production was deemed viable.
The solution was a vertical triple cam system—three precisely shaped discs stacked vertically—designed specifically to convert rotational energy from the movement’s gears into controlled linear (straight-line) motion.
The Triple Cam Architecture
The triple cam is crafted from bronze beryllium, chosen for its self-lubricating properties and low friction.
It consists of three inclines (sloped surfaces), each governing sixty minutes of motion. As the cam rotates, it drives a toothed rack—a bar with evenly spaced teeth—visible through a side window in the case. The rack turns the minute cylinder smoothly through 300 degrees.
At the sixty-minute mark, an extra flat linear spring releases stored energy, snapping the minute cylinder back to its starting position in under one tenth of a second. This retrograde action advances the hour cylinder by exactly one hour.
The cam completes one full rotation every three hours. Each incline contains 180 reference points to ensure isochronic motion and stable timekeeping.
Precision at Minimal Mass
The toothed rack must be rigid enough to transmit motion accurately, yet light enough to minimise energy consumption and resist shock.
This contradiction was resolved using photolithography, a precise manufacturing technique that uses light to create extremely accurate small parts. The rack features a honeycomb structure, offering maximum stiffness with minimal mass, produced by Mimotec (a specialist in micro-components) using techniques more common in advanced engineering than traditional watchmaking.
Seconds, Rethought
The seconds display is both digital and linear, executed via a rotating disc weighing just 0.09 grams. Skeletonised numerals (numbers with cut-out sections to reduce weight) reduce mass to the absolute minimum. A counterbalancing tab (a small weight balancing the disc) bearing the URWERK logo ensures perfect equilibrium.
This was a world first.
Managing Energy and Impact
Automatic winding is regulated by URWERK’s Rotor Fly Brake system, a pneumatic shock absorber (a device using air to cushion impacts) that protects the movement from sudden acceleration and harsh impacts. Its operation is visible through a side window, reinforcing the transparency of the design.
Case and Limited Production
The UR-CC1 case measures 42.6 mm by 53 mm by 18 mm. Its form follows function, shaped entirely around the linear display.
Two versions were produced:
White gold with a titanium caseback, limited to 25 pieces
Black gold with a titanium caseback, limited to 25 pieces
Total production was limited to 50 watches, and it was awarded the 'Best Design' in the 2009 Grand Prix d'Horlogerie Asia.
Interested in the UR-CC1 King Cobra from our UR-LEGENDS certified pre-owned, please contact us: I'm interested
But my gosh or ooo life force or call it as you will: all the innovations in Urwerk.
Hard to get my head wrapped around that
Wonderful write-up — as the former ones.
Interweaving philosophy, history, art and technology feels soulfully necessary; and not merely insightful, but straightforwardly essential. In short, it showcases and trail blazes... Show more