Grönefeld One Hertz Techniek’s open-work dial showcases its intricate upper mechanics within

Back in 2010, the watchmaker brothers Bart and Tim Grönefeld of the luxury watch brand Grönefeld presented the award-winning timepiece, the One Hertz, which was the world’s first wristwatch with independent dead seconds and featured a completely new movement, the G-02 Calibre. And in the following years, the impressive One Hertz collection that has received appreciation from haute horlogerie connoisseurs, has grown to include a number of exclusive versions, including the One Hertz Dune in rose gold which was unveiled at the Baselworld 2011, One Hertz Platinum, One Hertz Fire and the One Hertz Ice. And now in 2013, Bart and Tim Grönefeld has come up with the exclusively-new limited edition One Hertz Techniek, which notably features a stunning, open-work dial that boasts the intricate upper mechanics of Grönefeld’s own proprietary movement with 285 components, the Calibre G-02.

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The One Hertz Techniek’s dial is dominated by the large dead seconds chapter ring in sapphire, while the Grönefeld logo, bridges, and other indications has been crafted in stainless steel, which is further relief engraved, bevelled and finished completely with hand by master artisans.

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Further, the open dial is framed by a gleaming high-tech Grade 5 titanium case which is available in two versions, including the natural polished and brushed titanium or the black DLC coated one, only when this exclusive timekeeper becomes the “One Hertz Techniek Nocturne”.

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Limited to just 30 pieces, both of the timepiece versions features the Grönefeld’s own ergonomic winding and setting mechanism, which is selected by simply pushing the crown in, rather than pulling it out.

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With the One Hertz and its unique secondary gear train, the watchmakers Bart and Tim Grönefeld resurrected the much-neglected complication of dead seconds which was respected until 1980s, 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.

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