Grönefeld - Racing Pulse New York Saturday, December 12, 2020 | Phillips

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  • Manufacturer: Grönefeld
    Year: Circa 2013
    Case No: No. 1
    Model Name: One Hertz Classic
    Material: Titanium
    Calibre: Manual, G-02, 39 jewels
    Bracelet/Strap: Crocodile
    Clasp/Buckle: Titanium Grönefeld buckle
    Dimensions: 43mm Diameter
    Signed: Case, dial, movement and buckle signed
    Accessories: Accompanied by Grönefeld Certificate of Authenticity, wooden presentation box, and outer packaging.

  • Catalogue Essay

    The young, independent brand, Grönefeld The Horological Brothers, may be a name unfamiliar to many enthusiasts, however over the last decade they have established a strong reputation of innovative watches manufactured with a mission to “build elegant timepieces with surprising mechanisms”. The Dutch brothers, Bart and Tim, come from a watchmaking family first established in 1912 by Johan Grönefeld, and are passionate for exceptional watchmaking, creating complications that will be cherished for years to come.

    The Hertz One wristwatch was released in 2010 as the world’s first serially produced watch made with independent deadbeat seconds. While the complication is not unique in horology, it was Gronefeld’s secondary gear train powering the deadbeat seconds that added a novel ideal to modern horology. This dedicated gear train permits seconds to be driven from one independent mainspring barrel, while the hours and minutes are driven from a second mainspring. The dial’s unique design expressed the importance of this complication with its prominent display of the seconds comprising the majority of the dial, while the time, indicated in a small sub-dial at 2 o’clock, is relegated to a smaller role. The completely in-house movement is of the highest quality, with exceptional hand finishing of its stainless steel bridges throughout, and the use of a free-sprung, variable inertia balance with Phillips overcoil. One of only 30 limited edition examples produced in titanium, the present lot was the first of the series with serial number 1.

    Today, collectors are looking to independent watchmakers for timepieces that retain their traditional past, but add a 21st century sensibility. The Hertz One Classic is an exemplary example with a new and innovative independent deadbeat seconds mechanism. Consigned by the original owner and preserved in wonderful original condition, this rare titanium timepiece is an exciting watch certain to delight.


A rare and fine limited edition titanium wristwatch with independent deadbeat seconds, Certificate of Authenticity, and presentation box, numbered 1 of 30

Circa 2013
43mm Diameter
Case, dial, movement and buckle signed

$25,000 - 50,000 

Sold for $47,880

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Paul Boutros
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Senior Vice President
+1 212 940 1293

Racing Pulse

New York Auction 12 December 2020