Edouard Heuer (1840-1892) established Uhrenmanufaktur Heuer AG in St-Imier in Switzerland. He was just 20 years old. He was the son of a shoemaker, he started his apprenticeship as a watchmaker at the age of 14. In 1892, Edouard patented his first chronograph, showing it one year later at the Amsterdam International Exhibition. Edouard's sons, Jules-Edouard and Charles-Auguste took over the company when he died in 1892. Designing the first dashboard chronograph in 1911 for use in automobiles and aircraft, the patented "Time of Trip". In 1933, Heuer designed the highly successful AUTAVIA, a dash counter for racing cars, boats, and aircraft. Its name is derived from AUTomobile and AVIAtion, later used in the 1960s as a wrist chronograph. During the 1940s US President, General Eisenhower bought a Heuer chronograph ref. 2447 with a steel case in 1945. Harry Truman, the 33rd president of the United States, wore a Heuer triple calendar chronograph in gold ref. 2558 in 1947. In 1961, Jack Heuer created a new wrist chronograph with a turning bezel, which was a first for the Swiss brand. He named it “Autavia”, taken from the 1933 watch. In June 1985, Heuer sold the company to a Saudi business group called TAG (the acronym for Techniques d’Avant Garde) owned by Akram Ojjeh, a Saudi businessman who was considered to be one of the richest men in the world. Once completed, the company formally changed its name from Heuer to TAG Heuer starting on January 1st, 1986.