Harley-Davidson models. In the late summer of 1929, Harley-Davidson introduced its 45 cubic inches (737 cm³) flathead V-Twin to compete with the Indian 101 Scout and the Excelsior Super X. This was the "D" model, produced from 1929 to 1931. Riders of Indian motorcycles derisively referred to this model as the "three cylinder Harley" because the generator was upright and parallel to the front cylinder. The Great Depression began a few months after the introduction of their 45 cubic inch (737 cm³) model. Harley-Davidson's sales fell from 21,000 in 1929 to 3,703 in 1933. Despite this, Harley-Davidson unveiled a new lineup
Harley-Davidson in Southeast Wisconsin. The 110th anniversary celebration was held on August 29–31, 2013. The 115th anniversary was held in Prague, Czech Republic, the home country of the first Harley Davidson Club, on July 5-8, 2018 and attracted more than 100.000 visitors and 60.000 bikes. William S. Harley, Arthur Davidson, William A. Davidson and Walter Davidson, Sr. were inducted into the Labor Hall of Fame for their accomplishments for the H-D company and its workforce. The company's origins were dramatized in a 2016 miniseries entitled "Harley and the Davidsons", starring Robert Aramayo as William Harley, Bug Hall as Arthur Davidson and