Established in 1901, Belsize Motors was based in England. The company was founded by Marshall & Company and took its name from their Belsize works, where they had built bicycles. Before the First World War they were a major player in the United Kingdom's motor industry, employing 1200 people and making up to 50 vehicles a week. After the war, lagely due to quality problems, the company went into recevership in 1923 and ceased operations in 1925.