Emerald (United Kingdom) - AllCarIndex

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. This engineering choice contributed to the vehicle's lightweight characteristics, which were a hallmark of the brand's offerings during its short production run.

Following the closure of Emerald, Douglas Cox acquired the facilities of the Weller company, also located in West Norwood. He subsequently produced another model known as the Osterfield from 1906 until approximately 1909, continuing his involvement in the automotive industry beyond the Emerald brand.