Card Signed by Henry Ford II, "You Better Win," 24 Heures du Mans, June 18-19, 1966

As automobile racing speeds increased, repurposed dirt horse tracks became inadequate. In the 1910s promoters turned to wooden boards, which provided a smooth road surface and were less expensive than bricks or concrete. But rotting wood required frequent replacement. Improvements in concrete and asphalt made board tracks obsolete in the 1930s. The 1.25-mile board track at Altoona, Pennsylvania, operated from 1923-1931.

On April 13, 1934, Ford Motor Company received this unusual product testimonial. In it notorious bank robber Clyde Barrow extolled the virtues of Ford V-8s as getaway cars. Handwriting analysts have questioned the letter's authenticity, but it is the sort of thing the publicity-seeking Barrow might have written.

British-born Ken Miles was a gifted race car engineer and driver. Through his work for Carroll Shelby, Miles got involved in Ford's GT racing program. Miles won the 24 Hours of Daytona and the 12 Hours of Sebring in 1966, and he placed second at Le Mans. Miles died in a crash while testing Ford's J-Car later that year.

British-born Ken Miles was a gifted race car engineer and driver. Through his work for Carroll Shelby, Miles got involved in Ford's GT racing program. Miles won the 24 Hours of Daytona and the 12 Hours of Sebring in 1966, and he placed second at Le Mans. Miles died in a crash while testing Ford's J-Car later that year.