Grönefeld One Hertz with Independent Deadbeat Seconds

The Grönefeld One Hertz is the second complicated mechanical timepiece created by Swiss trained, Netherland based watchmaking brothers, Bart and Tim Grönefeld. The movement for this new timepiece, was created completely in-house. The dial indicates hours and minutes on a …

Imported: 29. Jun 2010 (19:31), PROFESSIONAL WATCHES

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