1959 Cadillac Cyclone

From February 20, 1959 press release
Detroit - Development of the Cadillac Cyclone, latest in a long series of General Motors experimental cars to test new styling and engineering ideas, was announced today by William L. Mitchell, GM Vice President in charge of Styling Staff.
The two-passenger automobile has a clear plastic top which folds backwards beneath the surface of the trunk deck. Among its advanced design and engineering developments is a radar locating device which scans the highway and warns the driver of objects in his path.
The Cyclone will make its first public appearance tomorrow in Daytona, Florida, where a week of automotive events is concluding. …