Bulle-Clock originated in the collaboration between clockmaker Maurice Favre-Bulle and physicist Marcel André-Moulin. Before the First World War, they developed a prototype of an electromagnetically driven pendulum clock. After André-Moulin's death, Favre-Bulle continued the work. In 1918, he filed a patent application jointly with André-Moulin's widow; the patent was granted in 1920. That same year, serial production began at the Compagnie Générale des Appareils Horo-Électriques. Production ceased during the Second World War and resumed in 1946. It ended after Favre-Bulle's death in 1954. An estimated 300,000 to 330,000 clocks were made in various case designs.