The Gronefeld brothers have a rich history in watchmaking dating back to 1912. This watchmaking legacy has continued with 3rd generation Tim and Bart Gronefeld. They made it their goal to build and create elegant timepieces with surprising mechanisms and timepieces that highlight their true passion for advanced watchmaking. You can truly feel the passion that the brothers share for horology when wearing one of their timepieces. The Gronefeld brothers made a name for themselves with models like the Principia, and more recently the Gronefeld Grönograaf.