Ford GT40 Roadster Prototype on the Block

The lone remaining 1965 Ford GT40 Roadster prototype in its original condition is up for sale.

The vehicle, bearing chassis no. GT/108, is listed on the website of specialist car dealer Girardo & Co. The asking price is available only to potential buyers, but the car is expected to fetch at least $6.9 million—which is what it sold for in 2014 to an unnamed purchaser.

The car, which will be displayed at this week’s Monterey Car Week in California, is one of 12 GT40 prototypes built and the first of just six Roadsters. Over the years, a half dozen owners have held title to the rare model, which received mechanical restorations in 1993 and 2003.

Painted white with blue racing stripes, the Roadster has a mid/rear-engine layout with a 4.7-liter V-8 that generates 380 hp. Other features include Weber carburetors, a 4-speed manual transmission, four-wheel independent suspension and four-wheel disc brakes.

Ford and Shelby American used the prototype to develop and validate the production GT40, which went on to win the 24 Hours of Le Mans endurance race four years in a row (1966-1969), including a one-two-three finish in its inaugural year. Carroll Shelby reportedly drove Henry Ford II in the roadster during a demonstration for Ford Motor Co.'s board of directors on the Los Angeles airport’s tarmac in 1965.