Gronefeld "One Hertz Techniek" Titanium LE B&P, Serial #8 (Estate)

Just arrived is the impressive "One Hertz Techniek" from Tim and Bart Gronefeld, the Horological Brothers of The Netherlands. The One Hertz’s calibre G-02 is a totally original, in-house developed movement featuring stainless steel bridges and exceptional fine finishing. In a dead seconds complication, friction of the mechanism has to be absolutely minimal so it does not interfere with the escapement and timing. For the One Hertz, Bart and Tim Grönefeld developed an independent dead seconds mechanism that is driven from its own secondary gear train with its own independent power supply. The dead seconds are driven from one mainspring barrel and the hours and minutes from another. The One Hertz’s innovative dual drive train results in less friction compared to other jumping seconds mechanisms. A more constant amplitude is obtained and thus assuring superior accuracy.

The Techniek case is crafted in Titanium and measures 43mm x 13mm thick (including crystals). The case is marked with Serial #8 and "Limited 30 Pieces". It is our understanding that in total only 6 Technieks were crafted in titanium.

Available pre-owned with Box and Papers.

UPDATE: As of 12/27/2022 this listing is On Hold Pending Funds.