A prime example is a set of design sketches from the 1930s and 1940s which ... as the Cadillac Fleetwood and LaSalle, as well as the Buick Y-Job, which is considered the first concept car produced ...

Sometimes, a concept car is just a fun idea, something that looks really cool or introduces some novel design ... The Buick Y-Job was designed by Harley Earl, who had pioneered the use of sketches ...