FROM PUBLISHED HISTORY TO DOCUMENTED EVIDENCE

STARTING POINT
The starting documentation supplied by the client identified chassis 911 360 0921 as a March 1973 Porsche 911 Carrera RSR, originally delivered to Manfred Weissmann of Speyer, Germany, and listed its production, engine and gearbox numbers. It also provided an extensive competition record for the 1973 season with Günter Steckkönig, followed by racing activity with Edgar Kaib in 1974 and 1975, the subsequent exchange with Jürgen Kannacher, and later association with Jean Verchere in France. The published account further stated that the car had been restored by Verchere and that its original body shell had subsequently been transferred to Carrera RS 2.7 chassis 911 360 0642.

RESEARCH
Automotive Masterpieces expanded the investigation through factory production documentation, period entry lists and race records, ownership documents, historical photographs and contemporary and later testimony. Factory documentation confirmed chassis, production and engine numbers, while also revealing significant details of its original construction. The Fahrzeug-Auftrag records the car initially under the Carrera RS Coupé designation, with an additional “R” entered by hand to identify it as an RSR. The same document notes “ohne Motor an Versand”, showing that the car reached the dispatch stage without its engine installed. These details are consistent with the production-based nature of the Carrera RSR programme and with Günter Steckkönig’s later recollection of the Weissmann car as a brand-new RS 2.7 that was built up at the Porsche factory for competition. Steckkönig’s testimony also added direct evidence concerning the origins of the 1973 programme and enriched the documented history with first-hand details on the car’s preparation, the circumstances of his involvement and the technical support available during the season. The car’s 1973 competition history was reconstructed in greater detail, confirming its extensive use in the Deutsche Rennsport-Meisterschaft and other events, including victories and podium finishes, together with its progressive development from the original 2.8-litre specification toward larger-capacity configurations. Further period evidence also documented its later competition career with Edgar Kaib. The subsequent ownership history was substantially revised through Swiss and Italian documentation. The research also reassessed the long-standing claim that the original body shell of chassis 911 360 0921 had been transferred to chassis 911 360 0642. Available evidence instead indicates that suspension assemblies and other running-gear components were transferred, while no conclusive evidence has been found that the original 0921 body shell itself was moved. The earlier published statement therefore appears to have resulted from a later conflation of the transferred components with the identity of the complete body shell. The resulting research reconstructed a substantially more complete history of chassis 911 360 0921, clarified the circumstances of its original competition use and factory preparation, extended its ownership history, and resolved a significant ambiguity concerning the survival and identity of the original chassis.