The 1954 Cadillac La Espada concept was a driveable show car first shown at the 1954 GM Motorama. It was a two-seat fiberglass convertible, mechanically similar to the El Camino concept coupe but with a specially engineered convertible top, ribbed to create a perfectly curved surface when closed.La Espada sported a recessed grille air intake in the front, which was guarded by massive and sweeping front bumpers. The bumpers were capped with white…