Rare - Large Opel Bicycles Shop Point Of Sale - Enamel Advertising Sign In 1923, Opel had become the largest manufacturer of bicycles in the world. Over 15,000 stores were selling bicycles made at Rüsselsheim. At the height of bicycle production and after the introduction of the assembly line in the middle of the 1920s, one bicycle left the factory every seven seconds. As the market leader, Opel even had its own racing squad and a plant riding team. Riders on the yellow and black racing bikes were among the favorites to win all the big races. Even three-time winner of the Tour de France, Philippe Thys from Belgium, relied on bicycles from Rüsselsheim in his victories. Opel Manufactured over 2.6 million bicycles. An attractive heavy enamel advertising sign for Opel Bicycles. Measurements: 51.5 cm Length x 35 cm Height. Weight 1.895 Kg's. The sign has a curve of around 2 cm and Four fixing holes. The sign is in good condition for its age with slight enamel loss around the screw holes and edging Worldwide Delivery via Express Tracked and Insured Courier service.