URWERK’s 1997 founding design returns as the URWERK UR-101 Green Mamba: a 41mm black PVD-coated steel case, an emerald-green wandering-hour display, and a run limited to 50 pieces. The independent Geneva maison first showed the UR-101 at Baselworld nearly three decades ago; this edition keeps that early outline and pairs black PVD-coated steel with a vivid green time track, a contrast reflected in its Green Mamba name.
The URWERK UR-101 Green Mamba returns the 1997 founding design in a 41mm black PVD-coated steel case with wandering hours on two satellites and self-winding caliber UR-1.01V. It is limited to 50 pieces at CHF 33,000 excluding tax.
From the start, the UR-101 set out the principles that still define URWERK—unconventional architecture, a reading of the hours outside traditional hands-and-markers conventions, and mechanical watchmaking treated as a visual language. Nearly 30 years on, that outline remains intact: one of URWERK’s earliest ways of showing hours and minutes without a conventional dial. Black PVD on the case and caseback frames the display as a protective shell, while the green track carries the hour and minute indications. The same satellite-hour lineage continues through later URWERK releases, including the URWERK UR-300 Time Quantum previously covered by Haute Time.
Time is read through wandering hours on two satellites, with minutes indicated along the adjacent scale. As each satellite presents the current hour, the hour marker travels along an emerald-green circular segment that carries the minute indication from zero toward sixty. Hour and minute markers are painted with SuperLumiNova for low-light reading, and a glare-proofed, metallized sapphire crystal covers the asymmetrical aperture cut into the case.
URWERK co-founder and master watchmaker Felix Baumgartner explains, “With the UR-101 Green Mamba, we’re returning to something very instinctive. This was a watch driven by an extremely simple intention: to display time differently. Here, the case almost erases the object itself, revealing only the essential information. Black enables it to disappear, while green gives it a distinctive identity.”
Co-founder and artistic director Martin Frei adds, “I love the idea of an object that becomes almost invisible, then reveals itself a moment later. The display then leaps out at you in a techno-green: the color of a spaceship’s control panels and also of a jungle-lurking mamba’s luminescent eyes.”
Inside, the self-winding caliber UR-1.01V beats at 28,800 vph (4 Hz) on 28 jewels and offers a 48-hour power reserve. Finishes include snailing, sandblasting, satin-brushing, and chamfered screw heads; its components use copper, brass, and ARCAP P40. The 41mm case measures 10.3mm thick and is pressure-tested to 30 meters / 3 ATM. A black rubber strap with black calfskin lining closes on a black DLC-coated steel pin buckle.
The UR-101 Green Mamba is produced as a 50-piece limited edition and priced at CHF 33,000 excluding tax. Nearly 30 years after Baselworld 1997, URWERK’s founding display idea returns in this black-and-green edition.
| Specification | Details |
|---|---|
| Model | UR-101 Green Mamba |
| Limitation | 50-piece limited edition |
| Movement | Caliber UR-1.01V, self-winding |
| Jewels | 28 |
| Frequency | 28,800 vph – 4 Hz |
| Power reserve | 48 hours |
| Movement materials (components) | Copper, brass, ARCAP P40 |
| Finishes | Snailing, sandblasting, satin-brushing; chamfered screw heads |
| Indications | Wandering hours on two satellites, minutes; SuperLumiNova on hour and minute markers |
| Case | Black PVD-coated steel case and caseback |
| Dimensions | 41mm diameter, 10.3mm thick |
| Crystal | Glare-proofed, metallized sapphire crystal |
| Water resistance | 30m / 3 ATM |
| Strap | Black rubber with black calfskin lining |
| Buckle | Black DLC-coated steel pin buckle |
| Price | CHF 33,000 excluding tax |
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