Ball Watch Company
Baume et Mercier
Bell & Ross
In 1917, in Lengnau, Switzerland, three brothers Fritz, Ernst, and Werner Schlup founded a clock company. What started off as strictly a producer of watch movements under the name Schulp & Co., Rado Uhren AG (the name change came in 1957 when Paul Luthi took over) would become, and is one of the largest producers of watches. Rado became known for being the world's first scratch-proof watch when it launched the Rado Diastar, in 1962. The V10K was created by Rado in 2004, and is known as the hardest watch on Earth according to the Guinness Book of World Records. It is made by transforming carbon into a nanocrystalline diamond and has a Vickers number of 10,000, hence its name the V10K.
Rado was acquired by the Swatch Group in 1983.