Montres TUDOR SA is a Swiss manufacturer of luxury wristwatches based in Geneva, Switzerland. Registered in 1926 by Hans Wilsdorf, the founder of Rolex, the brand remains a sister company to Rolex, both companies being owned by the Hans Wilsdorf Foundation. Over time, Tudor became well-known for its tool watches, producing watches for professional divers and the military. Between the 1960s and 1980s,^[3] several navies issued Tudor Submariners to their divers, including the US Navy SEALs and the French Marine Nationale (French Navy).^[4]