The car, which was buried in brand-new condition under the lawn of the Tulsa County Courthouse in 1957, is scheduled to be unearthed June 15 as part of the Oklahoma Centennial.
[...]
When the car was buried, a contest was announced to award the car and a $100 savings account to the person who came closest to guessing Tulsa's population in 2007.

Organizers concede that finding that person or his or her heirs may not be easy.

At the time, the guesses were recorded on microfilm and sealed in a steel container buried with the car.