1956 Buick Centurion Concept Car (I saw this Concept Car at The Sloan Museum in Flint, MI). Buick enthusiasts will recognize the “sweep-spear” chrome on the Centurion as being similar to the 1957 Buicks.
Now here's a hybrid we can get excited about. Check out this Buick Wildcat II Concept car built for the 1954 GM Motorama. Radical even by standards, this one off sporty Buick knocked 'em dead back in the day.