We always think of the 1921 Rumpler Tropfenwagen as being primordial, but here's a one-off concept from 1903. think I posted one small pic years ago (no,
you go and find it), but here are five (or six) good ones from JACG:
Just A Car Guy: 1903 Oldsmobile "Doctor Car" prototype, the only one ever made.
I like that aerodynamic foot-well.
Reminds me of the El Camino/Ridgeline discussion.