1964 Porsche 904 GTS

Car delivered new in Silver Metallic with blue interior, equipped with safety belts and a sports exhaust, clearly prepared for competition use.

Pirmasens-based competitor with motorsport experience since 1956; ran the car in numerous hillclimbs through the 1964 season and into early 1965 before selling after the Bergrennen Kautenbach.

Textile dealer and capable sports car driver who targeted the German Hill Climb Championship; modified rear arches to accommodate wider rear wheels. Traded the car for an ex-works 904/6 after the 1000 KM of Monza.

Venezuelan owner who acquired the car through Porsche in 1966; raced alongside Alfredo Atencio at Venezuelan events during 1966 and into 1967. Source is Pantis' reference book on the 904/906/910.

Caracas-based owner believed to have acquired the car after Capriles; raced it at Road Atlanta in October 1972, at which point it carried a six-cylinder engine.

Caracas-based vendor who advertised the car in a 1973 Road & Track issue at $8,500; at that time it had been refitted with a new factory four-cam Type 587/3 engine.

French hillclimb event.

Held the weekend after Bergrennen Luxemburg in September 1964.

First competitive outing for the car; Leinenweber dominated the entire field, not just his class.

Fourth consecutive class victory for Leinenweber with the car.

Held in Belgium in early November 1964.

Final round of the 1964 season for the car, held later in November.

Opening event of 1965 for the car; Leinenweber sold the car to Weber shortly after.

Weber's first outing with the car; set a strong early-season benchmark.

Weber finished behind both Rolf Stommelen and Udo Schütz on this occasion.

Austrian event held approximately two weeks after Rossfeld; wider rear wheels and arches believed to have been fitted beforehand.

Weber and Greger posted identical times, sharing top honours.

Described as the season's most prestigious event.

Weber beat Sepp Greger and Günter Klass, who were in a works 904; points counted toward the European Hill Climb Championship.

Held in wet and foggy conditions that disadvantaged factory Ferrari and Porsche prototypes; all top three finishers drove 904s. Weber tied for first in the German GT Hill Climb Championship but was placed behind Spiess due to displacement rules.

Co-driven by Jochen Neerpasch; the 904 led its class by nearly three seconds over an Alfa Romeo TZ2 before retiring with mechanical trouble. This was the car's final event under Weber's ownership.

Believed to have been entered by Flavio Espino; car was fitted with a six-cylinder engine at this stage.

Weber fitted wider rear wheels and tyres prior to the Axamar Lizum hillclimb, which required slight flaring of the rear wheel arches to accommodate the wider track.

Modification carried out by Weber himself according to the prose.

A six-cylinder engine was installed, believed to have been done following the engine failure experienced at the 1966 Monza race, and the car was in this configuration when raced at Road Atlanta in October 1972.

Exact date and installer unknown; inferred from the sequence of events described.

A replacement factory four-cam Type 587/3 engine (number 99 099) was fitted, restoring the correct four-cylinder configuration, as noted when the car was advertised for sale in Road & Track.

Engine number 99 099 recorded at the time of the 1973 advertisement.