Emerald was a British automobile brand that operated briefly between 1903 and 1904. The company was established by Douglas S. Cox & Co. in West Norwood, London. The brand focused on producing lightweight vehicles, specifically a two-seater voiturette that was powered by a 4-horsepower single-cylinder engine. The design of the Emerald featured a unique drive system, utilizing a long belt that connected a two-speed gearbox to the rear axle.…