URWERK – UR-Chronometry EMC-SR71 Steel and Titanium Edition 2024
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EMC SR-71, rebirth of a legend
It swept the award board. It was a double winner at the 2014 Grand Prix d’Horlogerie de Genève in the prestigious "Mechanical Exception" and "Innovation" categories. It was crowned "Watch of the Year" by Revolution Asia and "Best of the Best" by Robb Report USA. It has been praised by the press, endorsed by Philippe Dufour and remains incredibly present in horological minds ten years after its creation.
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To celebrate its decade in style, URWERK's EMC – for Electronic Mechanical Control – has been reinvented clad in the fuselage of the legendary SR-71 reconnaissance aircraft!
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The EMC is a mechanical watch whose concept and movement were envisioned, developed and created by URWERK in 2014. Its traditional functions – hours, minutes, seconds and power reserve – were complemented by an original, patented piece of information, the δ performance indicator. Thanks to this novel function, it is now possible, at the touch of a button, to assess the mechanical movement’s chronometric precision.
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| Urwerk – EMC Black (2014) |
This innovation made the EMC – Electro-Mechanical Control – the first mechanism to enable its wearer to measure their watch’s performance in real time. What's more, armed with this information, they can adjust the setting of their watch to achieve the ultimate goal of perfect timekeeping. Watchmaking bliss at last within reach! The rest is history: a double win at the Grand Prix d'Horlogerie de Genève in two of its flagship categories, along with unanimous acclaim from the specialist press! From awards to recognition, it’s a great story and could have ended there.
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"It's a bit of an insane story, yet at the same time, stories born of passion are the most beautiful, don't you think?" enthuses Jason Sarkoyan. "I threw myself headlong into this adventure. All the more so because I could rely on the knowledge and experience of Dr Roman Sperl ("RoMiG21" on Instagram), a doctoral student at Munich Technical University and, above all, one of the world's leading aeronautics experts.”
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The EMC SR-71 thus takes on the appearance of an instrument panel with four separate dials, two of which feature screw-down bezels. The emphasis is on the seconds indicator (dial at 2 o'clock), the tip of which is designed like a stealth aircraft. It is one of the EMC's flagship features, testifying to its smooth running and sense of precision. To its left – at 10 o'clock – the EMC's performance is displayed in seconds per day, while its power reserve appears below at 7 o'clock. At 5 o'clock, the classic hours and minutes are indicated by a set of hands. On the back of the EMC, its in-house movement is visible beneath a sapphire crystal.
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This in-house URWERK movement has been designed, developed and crafted in the URWERK workshops. Its performance is tested on four positions over a 30-day cycle to meet the most stringent standards for precision watches. "The SR-71 is a legendary aircraft, a competition beast designed to achieve the best performance. This is also the spirit in which we designed our EMC”, says URWERK’s master watchmaker and co-founder Felix Baumgartner. "These are two cutting-edge machines which, in order to perform at their best, need only to be steered by skilled hands.”
Its proven intrinsic qualities are based on the following characteristics:
⦁ Its original balance was made from ARCAP, an alloy favoured by URWERK for its non-magnetic and anti-corrosive properties. Its distinctive morphology was carefully calculated to improve its aerodynamics and minimise disturbances caused by air friction. This enables it to maintain optimum amplitude.
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⦁ Its drive unit providing the power takes the form of an imposing double barrel vertically mounted on a single shaft. This series-coupled twin barrel ensures the EMC's stable linear timing performance by endowing the EMC with an 80-hour power reserve.
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⦁ Its timing adjustment screw is accessible from the outside of the watch and enables extremely fine adjustments via the balance rate index regulator, by modifying the active length of the balance spring.
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The EMC control function is composed as follows:
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- ⦁ An optical sensor linked to the balance wheel.
- This sensor consists of a transmitter and a receiver positioned on either side of the balance. Its role is to record the oscillations of this organ operating at 28,800 vph (4 Hz) over a period of three seconds. This measurement is triggered manually by pressing a start button.
- ⦁ A 16,000,000 Hz electronic oscillator
- This provides the EMC’s benchmark timing rate. The performance of the EMC balance (4 Hz) is compared against this extraordinary oscillator to obtain the most accurate possible measurement.
- ⦁ An integrated circuit
- This calculator is capable of determining the differential (symbolised by the letter δ) between the movement's timing rate and that of the reference oscillator. Each microsecond difference between the two values is expressed as a gain or loss of a second per day of the movement’s timing rate. A variation of 0.0000014 of a second per half-vibration translates as a variation of one second per day.
- The EMC's monitoring unit (the optical sensor and the computer) is powered by a micro-generator made by Swiss company Maxon, famous for having developed the electromotors equipping the Mars rovers for NASA’s Pathfinder probe.
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"EMC is an ode to the mechanical watch and to the watchmaker’s craft”, explains Felix Baumgartner, master watchmaker and co-founder of URWERK. "The mechanical watch is a sensitive organism and its movement’s timing rate fluctuates according to several parameters”, he continues. "These changes of pace and performance are perceptible to the watchmaker, who has all the equipment necessary for testing the accuracy of the movement. An amateur rarely has these tools. With the EMC, we give them the opportunity to dive into the heart of their watch, to see it live and evolve. “
Therein lies the entire concept behind the EMC. This new kind of mechanical watch has a threefold objective:
- ⦁ show the influence of external parameters (activity, temperature, pressure) on the balance-spring mechanism;
- ⦁ correct these timing variations at source, provide flexibility and achieve the best possible chronometric performance;
- ⦁ enable exchanges and encourage interactivity between a timepiece and its owner, as the wearer of the watch also becomes its precision timer.
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"This EMC adopts the bold design and matte black fuselage of the legendary SR-71 Blackbird. This prestigious collaboration is the perfect blend of horological excellence and aeronautical engineering. The new edition of the EMC not only measures time with unrivalled precision, it also captures the SR-71’s spirit of speed and stealth. It's a unique and exhilarating experience”, explains URWERK’s co-founder and artistic director Martin Frei.
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TECHNICAL SPECIFICATIONS
Collection: Electronic Mechanical Control
Model: EMC SR-71 Ttitanium-Steel Edition
Case
Material: Titanium and steel
Crank handle in SR-71 alloy
(titanium; aluminium; vanadium; silicon; iron and molybdenum)
Dimensions : Width 47.55mm; length: 49.57mm; thickness: 17.58mm
Crystal: Crystal sapphire
Water resistance Pressure tested to 30m / 3ATM
Finishing: Shot-blasting
Movement
Caliibre: UR-EMC; in-house URWERK movement
Escapement: Swiss lever escapement
Balance: ARCAP P40; URWERK balance coupled with optical sensor
Frequency: 28,800 vph – 4 Hz
Balance spring: Flat
Energy source: Vertically mounted series-coupled double mainspring barrels
Power reserve: 80 hours
Winding: Manual winding
Finishing: Côtes de Genève; snailing; micro bead-blasting; chamfered screw heads
Artificial intelligence
Generator: Manual-winding Maxon® generator
Monitoring organ: Optical sensor linked to the mechanical balance; 16,000,000 Hz electronic oscillator
oscillator
Electronic circuit
Indications
Hours; minutes; seconds; δ performance indicator (patented); power reserve; timing adjustment screw.
Strap
NATO strap (nylon, leather) inspired by aeronautical safety straps. Velcro fastening.
🔰Edition ❱❱❱ Only ✅10 Pieces
🔴 Price CHF 150,000 (Swiss francs / tax not included) 💰
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Press Release - 2024
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Media contact:
Ms Yacine Sar
Telephone: +41 22 900 2027
Mobile : +41 79 834 46 65
www.facebook.com - URWERK
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www.Urwerk.com
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