hen André Citroën begins to sell cars under his own name in 1919, he is already skilled in volume production methods and automotive technology. Graduating in 1900 from France's most prestigious engineering college, the Ecole Polytechnique, he founds his first company in 1902 after completing his military service.

He acquires a patent for gear-cutting technique that he discovered in Poland, the main characteristic of which is to produce gears with chevron-shaped teeth. The new gears work smoothly and quietly, and are more effective in transmitting power. The shape of the gears provides the inspiration for the celebrated double chevron, emblem of all vehicles produced by Citroen.

In 1907, Andre Citroen discovers the automotive industry, when he is brought in to help Mors, a troubled car manufacturer in Paris. He accepts the challenge of turning the company around and sets to work. His organisational skills and efficiency quickly bring results. In the space of just a few years, Mors cars start attracting customers once more, the company's financial situation improves and it starts turning a profit. In seven years, the production of Mors cars is multiplied by eighteen.