Aaron Bower of Cortland displays his 1970 Oliver 1855 at the National Oliver Summer Show in Wooster. (Salem Newsl/Ron Firth)

The Oliver Gang was included as more than 500 tractors attended the National Oliver Summer Show in Wooster.(Salem News/Ron Firth)

Thomas Gress of Shreve took some liberties by turning his 1968 Oliver 1850 tractor into a red, white and blue 1776 America in time for the Fourth of July. (Salem News/Ron Firth)

Ron Grosjean of JR Acres in Wooster shows his 1968 Oliver 1750 high crop tractor (left) and 1985 White 2-110 at the National Oliver Summer Show. (Salem News/Ron Firth)