Unlike typical chronograph watches, there is no stopwatch dial. Heuer introduced its first wrist chronograph in 1914. Omega Speedmaster is a line of chronograph wristwatches produced by Omega SA. They include a rotating bezel and a yacht timer chronograph. Automatic chronograph wristwatches were not available until 1969. First came the Tudor Grantour Chronograph and the Tudor Glamour collection of classic watches. Patek Philippe perpetual calendar chronograph was introduced in 1941, with Ref. Seiko later went on to introduce the first quartz chronograph. The watches had a split seconds chronograph, a minute repeater, and a perpetual calendar. In 1975, Heuer introduced the Chronosplit, a digital chronograph with dual LED and LCD displays. These watches had particular functional features, for example divers' models with date or chronograph function. Other types of modern-day chronographs are the "automatic chronograph" and the "digital chronograph". The term chronograph is often confused with the term chronometer. In 1911, Heuer received a patent for the "Time of Trip", the first dashboard chronograph. The similar-sounding terms chronograph and chronometer are often confused, although they mean altogether different things.