The Grönefeld family has a history spanning for more than a hundred years in watchmaking. Bart and Tim Grönefeld are the third generation to continue the family tradition, which was founded by Johan Grönefeld in 1912. After a long career working for the most prestigious Swiss watch manufacturers, the Grönefeld brothers presented their first watch, a Tourbillon Minute Repeater, in 2008. They followed this in 2010 with their award-winning One Hertz, first in-house developed caliber. Grönefeld timepieces stand out for the innovation of their technical features, the clarity of their design and the excellence of their craftsmanship.