This vanity plate is so old that it really isn't a vanity plate. Under a previous Ohio license plate system, ZB was one of the designations for Bluffton drivers. During the days when a license bureau was actually in Bluffton, the agent would hold back plates for persons who requested the same one year after year. Often the number on the plate represented the driver's street address. In this case, Don and Joanne Overmyer of 325 W. Elm St. kept their plate and made a vanity plate from it when the license system dropped local bureaus.