This is an interesting piece of agricultural, tractor-show, county-fair, and John Deere-related memorabilia. I would avoid calling it an official John Deere-issued item unless additional markings or documentation establish that connection—the plaque depicts a John Deere tractor, but the photographs don't identify its manufacturer.
1989 Washington County Fair “Antique Tractor Exhibit” cast-metal commemorative plaque, featuring an early John Deere tractor in raised relief.
The rectangular plaque measures approximately 3-5/8 × 2-5/8 inches and is made from a silver-gray cast metal, likely an aluminum or similar alloy. The front has a recessed black background with raised, unfinished-metal lettering and tractor details. Across the top is “ANTIQUE TRACTOR EXHIBIT,” with “1989” displayed in a raised rectangular panel at upper left. The bottom reads “WASHINGTON COUNTY FAIR.”
The centerpiece is a highly detailed relief depiction of an early John Deere farm tractor, showing large lugged rear wheels, spoked front wheels, exposed mechanical components, vertical exhaust stack, and visible JOHN DEERE lettering on the tractor.
There are four mounting holes, one near each corner, indicating that the plaque was intended to be screwed or fastened to a display, exhibit, tractor, or other surface. The reverse is plain and unfinished, displaying casting and surface marks.