The 1939 Plymouth Deluxe 6, also referred to as the "Ghost Car" because its chassis was constructed of plexiglass , is driven at the Inn at St. Johns in Plymouth, Mich. July 28, 2011. The see-through Pontiac built by General Motors for the 1939-40 New York World's Fair is going on the auction block this weekend. The car's Plexiglas body offers a view of its chrome, steel and iron innards. It also features white-colored rubber moldings and tires.