In 1963 HEUER introduced the Carrera chronograph. Three years later, in 1966, Heuer introduced the Carrera "Dato 45." It was one of the very first wristwatch chronographs to feature a rotating date disc. An advertisement ran in 1969 and 1970 promoting the Heuer Carrera Dato 45 as "ideal for the businessman who needs a chronograph but can never remember the date."