Opel Olympia modelo 1937 Cabriolet Before W.W. II this light staff car was made in two versions. From 1935 to 1937 this car had a 1.3 litre engine. For the OL38 version made from 1937 to 1940 this was replaced by a 1.5 litre overhead valve unit. The model 1935 was Germany's first mass-produced car with an all-steel unitized body. This revolutionary technology reduced the weight of the car by 180 kilograms (400 lb.) compared to its predecessor. Between 1935 and the 1940 over 168.000 units were built.