Completed on February 27, 1964, this Porsche 904 Carrera GTS, chassis 904028, was delivered to German racer Gerhard Koch. Koch, a seasoned driver with a win over Jim Clark at Zandvoort and class wins at the Targa Florio and Nürburgring, excelled with the car, winning the Rheinland-Pfalz Trophy at the Nürburgring and placing 2nd overall at the Grand Prix de Paris. Koch also campaigned the car in events such as the German GT Championship, Spa 500 km, and the Angola Grand Prix, finishing First in Class and 3rd overall behind two Ferrari 250 LMs.
At the end of 1964, Koch sold the car to fellow countryman and racer Rainer Ising. In 1965, Ising achieved significant results, including a 1st at Zolder and 3rd at Trier. Teamed with Bernd Degner, Ising secured an incredible First in Class and 3rd overall finish at the grueling 82-Hour Marathon de la Route at the Nürburgring.
Following the 1965 season, Ising reportedly offered 904028 for sale through the Porsche factory. By 1966, the car is believed to have been imported into the U.S. by Uwe Buehl, a former Porsche Works and Vasek Polak mechanic, for Pennsylvania-based privateer Roger Neuman. Neuman raced the car only twice before trading it back to Buehl, who sold it circa 1968 to Dieter Oest, a mechanic at Holbert Porsche-Audi in Philadelphia. An avid racer, Oest campaigned it primarily in SCCA events until early 1969, when the car was retired from competition. Chassis 904028 later returned to Buehl, who repainted it white and installed a type 901/05 6-cylinder engine, reportedly built to 906 specifications.
Today, 904028 is fitted with a 901/05 flat-6-cylinder engine and 904 gearbox, and is accompanied by a manual, spare parts, tool roll and assorted literature.
(Introductory description courtesy of Gooding Christie’s.)
