Exhibited at the Show of 1925, the Opel 4/12 bhp "Laubfrosch" (German for tree frog) was first produced in 1924. Its 4-cylinder pressure-lubricated engine could reach speeds of 45 mph. It had an electric starter and a 3-speed gearbox with reverse gear. Opel launched it on to the market at a price of DM 3000.