1957 Cadillac Eldorado at Recent Auction at Austin Convention Center
These were very expensive cars. Note that perhaps no other car had quad headlights in 1957 widely adopted the next year. Many of the cars at this auction were from Motoreum in NW Austin, Austin’s largest showroom. See their link at right.
CORRECTION: Several cars had quads in 1957, see comment from Wayne. Thanks Wayne!