Unveiled at the Paris Motor Show in October 1966, the 275 GTB/4 was a groundbreaking Ferrari. As Maranello’s first four-cam road car, the GTB/4 paid homage to the dominant sports racing prototypes of the era and pointed to the future of Ferrari design.

Subtly differentiated from the long-nose, two-cam 275 GTB by a slight bulge on the bonnet, the true beauty of the GTB/4’s design lay beneath the surface. The 3.3-liter tipo 226 engine was inspired by Ferrari’s successful line of prototype cars, featuring dual overhead-cam cylinder heads, dry sump lubrication, and an impressive lineup of six Weber 40 mm carburetors—an arrangement that was a desirable option on earlier 275 GTBs. The result was a free-revving 300 bhp engine with improved low-end torque and greater overall flexibility.

Beyond its magnificent four-cam V-12 engine, the 275 GTB/4 benefited from other notable refinements, from the implementation of the improved torque-tube driveshaft to more modern interior appointments. Beautiful, civilized, and devastatingly fast, Ferrari’s four-cam berlinetta had few peers on the roads of 1967.

According to the research of Ferrari historian Marcel Massini, the 275 GTB/4 presented here, chassis 10507, was completed in October 1967. Factory records confirm that this car was originally finished in the elegant and seldom-seen color scheme of Rosso Cordoba, a dark metallic red, with an interior trimmed entirely in beige Connolly leather.

Originally specified for the US market, 10507 was delivered new to Modern Classic Motors, Bill Harrah’s dealership in Reno, Nevada, which served as the official West Coast Ferrari distributor throughout the late 1960s and early 1970s.

Little is known of 10507’s whereabouts until 1976, when David C. Anderson of Decatur, Illinois, purchased it from Ferrari specialist John Hajduk. In June 1977, Mr. Anderson exhibited the 275 GTB/4 at the 15th Annual Ferrari Club of America National Meeting in Watkins Glen, New York, earning a Third in Class award. In 1985, he commissioned Remo Ferri’s Maranello Sports Cars Inc. in Ontario, Canada, to carry out a restoration that included paint and upholstery, an engine rebuild, and other mechanical attention. Records on file indicate that this process was completed in or around 1987, with approximately 40,000 miles showing on the odometer.

Remarkably, Mr. Anderson kept 10507 in his care until 1992, when he sold it to noted collector Steve Hamilton of Carson City, Nevada. The following year, Mr. Hamilton sold the Ferrari to Theodore J. Day, an heir to the Keck-Day Superior Oil fortune. Soon after acquiring the 275 GTB/4, Mr. Day had it repainted in its current Rosso Corsa (Racing Red) livery and it then served as the centerpiece of his Reno-based collection for the next two decades.

A fixture in a significant California-based Ferrari collection since it was acquired from Mr. Day’s estate in 2017, this fascinating 275 GTB/4 presents today in well-kept, driver-quality condition. Under the current ownership, the Ferrari has been shown just once, at the 2019 Shanghai Super Classic, where it was awarded Best of Show.

Recently subjected to an extensive detailing, the paint, chrome, and interior continue to show well for their age, while the engine bay and undercarriage have the pleasing appearance of a car that has never required a complete, ground-up restoration. At the time of cataloguing, the odometer displayed 42,376 miles – consistent with sparing use reported over the past three decades.

Significantly, the consignor believes 10507 to be an authentic example from a component perspective, retaining its original riveted data tag and clear chassis frame stamping. Furthermore, the engine, with corresponding internal no. 1886, is the original matching-numbers unit per copies of the factory build sheets on file.

Included with the sale is a tool kit, reproduction handbook folio and owner’s manual, and a history file that contains copies of the factory build sheets, assorted service and restoration records, ownership documents, correspondence, and a history report compiled by Ferrari historian Marcel Massini.

The ultimate evolution of a beloved and iconic Ferrari model, the 275 GTB/4 is undoubtedly among the most sought-after sports cars of the 1960s. This example, with its distinctive factory specification, genuine character, and limited roster of enthusiast owners, is a truly exciting find – one worthy of serious consideration.