Certus Gearless Co. Ltd was a British automobile manufacturer based in London, active between 1907 and 1908. The company focused on producing vehicles that showcased the principle of friction drive, a technology that was innovative for its time. During its brief existence, Certus manufactured both 2-cylinder and 4-cylinder cars. The 4-cylinder models were equipped with a 3-liter Aster engine, which contributed to the performance of these…