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    Dutch watchmakers Tim and Bart Grönefeld present two new additions to the One Hertz lineup, the Techniek and Techniek Nocturne, the world’s only series wristwatch with independent dead seconds.

    “Here, we have made the One Hertz’s movement and mechanics more visible than ever with an open-work dial,” they say. “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”. No word on price yet , we will update you on price and availability when this information becomes available. For more info, visit Gröenfeld’s website.

    Technical Specifications:

    Features and indications
    Independent dead seconds large dial at 7 o’clock
    Hour and minutes subdial at 2 o’clock
    Power reserve indicator at 11 o’clock
    Innovative Winding-Setting mechanism
    Winding-Setting indicator at 3 o’clock
    In-house calibre G-02

    Case and dial
    Case material: Grade 5 polished and brushed titanium and black DLC (Diamond Like Carbon) coating
    Engraving: “Titanium”, “Limited 30 pieces” and the serial number
    Screws: Stainless steel security screws
    Case dimensions: 43 mm x 12.5 mm
    Sapphire crystals: Top domed with antireflective treatment both sides; flat display back with antireflective treatment on both sides
    Water resistance: 3atm/30m/100 feet
    Crown: Titanium, black DLC coated with engraved “G” logo and push to set/wind function
    Dial: Stainless steel open dial. Relief engraved, bevelled and finished by hand
    Hands: Hours and minutes, large counter-poised seconds, power-reserve and setting-winding
    Strap and buckle: Hand-sewn matte black, alligator leather with steel tang buckle black DLC coated (Nocturne), Grönefeld logo

    Calibre G-02: Mechanical hand winding, independent dead seconds, power reserve indicator and setting mechanism indicator.
    Dimensions: 34mm x 9.5 mm
    No. of parts: 285
    No. of jewels: 39 jewels set in gold chatons
    Power reserve: 72 hours
    Barrels: 2 barrels, one for the going gear train and one for the independent dead seconds mechanism. Both barrels are wound at the same speed and in the same direction
    Balance wheel: 9.12 mm free sprung variable inertia balance wheel Balance frequency: 21’600 bph / 3Hz
    Balance spring: Phillips terminal overcoil curve, triangle-style stud
    Escapements: Swiss lever escapement and unique dead seconds escapement
    Main Plate: Hand frosted and spotted black rhodium plated nickel silver
    Bridges: Stainless steel hand bevelled, micro-blasted, circular grain on the top, relief engraved on micro blasted surface
    Gearing: 2 independent gear trains each with their own energy sources (2 barrels)
    Dead seconds mechanism: Independent mechanism, cam with 30 teeth on the going gear train on the fourth wheel, escape wheel on the fourth wheel of the independent gear train, unique double lever with 4 jewelled pallets
    Winding-Setting mechanism: Push function crown for winding or setting
    Power reserve mechanism: Classic Breguet style by means of a cone moving up and down on the threaded barrel arbour

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