Gone, But Not Forgotten The last Oliver green tractor may have rolled off the assembly line nearly three decades ago, but by the time the company's legacy was already cemented. With their unmistakable dark green paint, yellow grilles and red wheels, Oliver and Hart-Parr tractors were fixtures on American farms from the early 1900s into the 1960s, when he companies were acquired by White. In Oliver Hart-Parr , tractor enthusiasts can now revisit the evolution of two of the country's most successful tractor and farm equipment builders. Tractor and farm equipment historian and expert C.H. Wendel expertly covers every Oliver model ever produced, including the Hart-Parr tractors that Oliver purchased in 1929, as well as machinery from Cletrac, Nicholas & Shepard and Cockshut. Thanks to Wendel's meticulous research and more than 1,500 photographs, tractor enthusiasts can take a ride through history with these glorious machines of the past.