Grönefeld One Hertz Titanium Limited Edition

The Grönefeld One Hertz is the world’s first and only series wristwatch with independent dead seconds. It features a beautiful solid silver dial and an entirely in-house developed movement with stainless steel bridges and exceptional fine finishing. Dead seconds is where the second hand advances in full steps of one second instead of the usual smooth sweeping action of mechanical seconds. With the One Hertz, Bart and Tim Grönefeld have resurrected this long-neglected horological complication and re-positioned it on the pedestal of high precision. Until the arrival of the One Hertz, dead seconds – secondes mortes in French – in wristwatches was usually derived from constant force devices. The Grönefeld One Hertz is unique among wristwatches in that to maximize precision, its dead seconds are powered by a secondary gear train, independent of the gear train for the hour and minute indications.

The Grönefeld One Hertz was awarded the prestigious special Jury Prize by the watch magazine 0024 and was voted the Watch of the Year by the readers of Timezone.com.

Limited to 30 pieces, titanium case on a strap with a titanium tang buck, stainless steel manual wind Gronefeld caliber G-02, large deadbeat seconds and hours/minutes each have their own mainspring barrel, white dial with silver accents and blued hands, power reserve at 11 o’clock, setting indicator at 3 0’clock (the crown is pushed in to alternate between setting and winding), display back, sapphire crystal, water resistant to 30 meters, size: 43mm, thickness: 12.5mm.

The watch comes in original packaging, with a set of documents.