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| One Hertz Techniek courtesy of Grönefeld |
Bart and Tim Grönefeld present the One Hertz Techniek, the world’s only series wristwatch with independent dead seconds, featuring a stunning, open-work dial that showcases the intricate upper mechanics of Grönefeld’s own proprietary movement, the calibre G-02.
With the One Hertz and its unique secondary gear train, Bart and Tim Grönefeld resurrected the long-neglected complication of dead seconds – where the second hand advances in full steps of one second instead of the usual smooth sweeping action of mechanical seconds – and re‑positioned it on the pedestal of high precision.
The Grönefeld One Hertz is unique among wristwatches in that its dead seconds are powered by a secondary gear train, independent of the gear train for the hour and minute indications.
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| One Hertz Techniek courtesy of Grönefeld |
While the One Hertz Techniek’s dial is dominated by the large dead seconds chapter ring in sapphire, the other indications, bridges and Grönefeld logo are crafted in stainless steel, which is relief engraved, bevelled and finished completely by hand.
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| courtesy of Grönefeld |
The open dial is framed by a gleaming high-tech Grade 5 titanium case available in two versions: natural polished and brushed titanium, or black DLC – when the timepiece becomes the “One Hertz Techniek Nocturne”.
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| courtesy of Grönefeld
Both versions feature the Grönefeld’s own ergonomic winding and setting mechanism, selected by simply pushing the crown in, rather than pulling it out.
Bart and Tim Grönefeld chose the name 'Techniek' for a very simple reason. The Dutch watchmakers say:
“Here, we have made the One Hertz’s movement and mechanics more visible than ever with an open-work dial. The technicality of the movement is really on show, so we called it the One Hertz Techniek, because ‘techniek’ is the Dutch for ‘technical’.”
The “One Hertz Techniek” is a limited edition of 30 pieces in Grade 5 titanium, with either a natural finish – “One Hertz Techniek” – or black DLC coated – “One Hertz Techniek Nocturne”.
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