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Gronefeld
Independent’s day - Grönefeld “One Hertz” Dune
- Watch Review
- 20th February, 2013
The two Dutch brothers, Tim and Bart Grönefeld fooled me into thinking the “One Hertz” nomen, referred to the frequency of the balance wheel. It actually refers to the dead beat seconds, sometimes referred to as “second morte” or “jumping seconds”.