This 1963 ad by Masonite planned to award a 1963 Jeep Wagoneer as the grand prize as part of a drawing. To enter, contestants had to go to fill out an entry form describing five ways to use Masonite hardboard products. Unfortunately, I could not determine who won the jeep.
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This ad for the contest appeared in the July 04, 1963, issue of the Brockway Record out of Pennsylvania: