This 1954 Maserati 250F “CM4,” now offered through Broad Arrow Private Sales, is an exceptionally documented example of Cameron Millar’s celebrated continuation-built Grand Prix cars. It is the fourth of the original series of 250F “tool room” copies produced by Millar, with its construction entrusted to renowned restoration specialist Paul Grist. More than a recreation, CM4 incorporates a remarkable collection of genuine Maserati components, including the 2.5-liter inline-six engine, transmission, axles, and brakes from 250F chassis 2505.
The original 2505 holds extraordinary competition provenance. It was a works Maserati driven by Juan Manuel Fangio to victory at the 1954 Argentine Grand Prix, the 250F’s debut World Championship appearance, before Fangio used it to win again at Spa-Francorchamps. During its 1954 factory campaign, the car was also raced by Alberto Ascari, Luigi Musso, Onofre Marimón, and Harry Schell, further cementing its place in Formula One history.
Cameron Millar was among the earliest and most respected authorities on the 250F. After acquiring his first example in 1964, he accumulated an extensive reserve of original chassis and components from Maserati’s former racing operation. Recognizing that he possessed enough authentic material to construct additional cars, Millar produced a limited series of highly accurate 250F copies between 1972 and 1980. Their authenticity was such that Juan Manuel Fangio himself acquired one, while the FIA ultimately recognized the cars as eligible for historic competition.
CM4 was originally commissioned by Count Hubertus von Döenhoff and completed using the authentic 2505 components supplied to Paul Grist. Finished to competition specification by 1981, it entered historic racing shortly afterward, competing at venues including Monza, Monaco, and St. Moritz. Its remarkable fidelity to the original 250F was initially so convincing that it was believed to be chassis 2505 itself. Although the genuine 2505 was later rediscovered, CM4 retained its extraordinary mechanical pedigree.
In recent years, CM4 has remained an active participant in European historic motorsport. Under the care of the consignor, it competed at events including Jerez, Oulton Park, Spa, Silverstone, Zandvoort, and Hockenheim between 2023 and 2025. Renowned 250F specialist Steve Hart Racing has also carried out extensive preparation, testing, restoration, and race support, with documented expenditure approaching £500,000.
Accompanied by its FIA Historic Technical Passport, valid through 2033, correspondence from Cameron Millar, and extensive supporting documentation, CM4 represents a rare intersection of authenticity, provenance, and usability. It is not merely a museum-quality tribute to Maserati’s legendary front-engined Formula One era, but a fully prepared historic racing machine capable of continuing its story at some of the world’s most prestigious circuits.
Source: Broad Arrow Private Sales
