Harry Blomberg opened the Estes-Winn Antique Car Museum on June 20, 1966. He dedicated the museum to Cathryn Estes and Barbara Winn. Estes was the first wife of General Motors president E. M. Estes. She passed away in 1965. Winn was the granddaughter of Lonnie Holmes, a Pontiac executive, who died of cancer at the age of 15.