In 1979, the prototype of an amphibious car called Conte was built at Herzog Stahlbau GmbH in Kriftel/Taunus. The vehicle was equipped with a 2.6 liter V6 engine (114 hp) from the Ford Granada and had a self-supporting structure made of galvanized sheet steel. The amphibian with the dimensions of a small landing craft had two-wheel drive with off-road gear and differential lock. Large-volume tires enabled driving in the mud and in swampy terrain. The top speed was around 15 km/h in the water and 140 km/h on the road. A series production did not materialize.