The innovative spirit of Urwerk continues to propose original solutions in mechanical watchmaking. With the UR-103 model, a generation of timepieces began, the result of the constructive and revolutionary enterprise of master watchmaker Felix Baumgartner and designer Martin Frei. Now comes the UR-103T, where T stands for Tarantula. Perhaps it is because the four satellites that indicate the hours and the four arms of the central orbital cross resemble the eight legs of the arachnid. Baumgartner has modified the mechanism that drives the rotation of the aluminium satellites, which now rotate simultaneously on their own axis performing four evolutions until they return to indicate the hour, for a total of 480° from when they leave the arc of minutes to when they resume it. This movement requires 300 times more thrust energy than a traditional hand game. Compared to previous models, then, in which the Arcap structure surmounting the orbital cross largely covers the complex mechanism, the Tarantula shows a total overview of the mechanics. Made of ALTiN (Titanium, Aluminium Nitrate) treated steel, it is equipped with the hand-wound Calibre 3.03 (21,600 vibrations per hour, 43 hours power reserve). On the titanium caseback, which the company calls the Control Board, is the power-reserve indicator, the 15-minute regulator dial, the continuous seconds dial, and a small screw that corrects any delays or advances in a range of +/- 5 seconds per day.
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