URWERK UR-100V LS Ceramic: When Light Becomes Time
Key Highlights
- UR-100V “LightSpeed” Ceramic displays the time required for sunlight to reach each planet.
- Three-dimensional planetary indication paired with URWERK’s wandering satellite hours and minutes.
- White ceramic composite case with glass and carbon fibres for enhanced shock resistance.
- UR 12.02 selfwinding calibre with Windfänger turbine, twin barrels and 48-hour power reserve.
- Limited edition, pressure tested to 5 ATM, priced at CHF 67,000 before tax.
A cosmic narrative on the wrist
The UR-100V LS Ceramic, or “LightSpeed”, translates the propagation of light from the Sun across the solar system into an analogue display. URWERK’s wandering satellite hours partially surrender their usual timekeeping role to trace a photon’s journey through space.
As each hour satellite leaves the minute track, it switches from displaying conventional time to entering a planetary display representing the eight planets. Each position corresponds to the time sunlight takes to reach that world: Mercury in 3.2 minutes, Venus in 6 minutes, Earth in 8.3 minutes and Mars in 12.6 minutes; Jupiter, Saturn and Uranus at 43.2, 79.3 and 159.6 minutes, and Neptune after 4.1 hours.
Artistic Director and co-founder Martin Frei sees the watch as a fragment of the universe on the wrist, slowing an almost instantaneous event to something legible. Co-founder and master watchmaker Felix Baumgartner links this to the way starlight reaches us long after its source has faded: what we see is never the present, only memory.
Engineered ceramic architecture
The case of the UR-100V LS Ceramic uses a ceramic composite that addresses the traditional brittleness of sintered ceramics. Finely woven ceramic fibres are integrated with alternating layers of glass and carbon fibre in a polymer matrix, combining hardness and precision with improved resistance to shock.
A white resin highlights the silvered glass-fibre layers, producing a stratified architecture that shifts between matte and soft luminosity. Frei describes white as a state of light created when all visible wavelengths are reflected and scattered; here, white ceramic and white light meet at the surface, framing a black dial conceived as a window into space.
UR 12.02: controlled power and display
The UR 12.02 selfwinding calibre drives the LightSpeed indication with a Windfänger air-resistance turbine that regulates winding efficiency. A 28,800 vph frequency and twin barrels deliver a 48-hour power reserve, and the movement is built on three ARCAP alloy baseplates for stability.
Aluminium satellite hours mounted on beryllium-bronze Geneva crosses orbit via an aluminium carousel, while a black PVD-treated aluminium rotor visible through the micro-blasted DLC-treated grade 5 titanium caseback evokes the Sun. Circular graining, sandblasting, shot-blasting and circular satin finishing define the surfaces, with chamfered screw heads referencing classical watchmaking, and Super-LumiNova on the hours and minutes ensuring night-time legibility.
The case measures 43 mm in width, 51.73 mm in length and 14.55 mm in thickness, with a titanium inner container and sapphire crystal. Water resistance is supported by a screw-down crown and testing to 5 ATM, while black or white textured rubber straps with a deployant buckle secure the watch on the wrist.
Why it matters
The UR-100V LS Ceramic distils URWERK’s idea of an original mechanism into a complication where time is linked directly to the physics of light and the scale of the solar system. It allows the wearer to read both hours and astronomical distance in a single glance.
For GCC connoisseurs focused on independent watchmaking, the piece stands at the junction of advanced materials, conceptual design and meticulous finishing, signalling the breadth of ambition within contemporary independent haute horlogerie.
