We expect a beast of burden to have certain shapes. The head is a wedge-shape with nearly vertical axis. The rump is a quarter-cylinder with transverse axis.
From 1920 until 1946, coupes and roadsters satisfied these expectations. The head was a wedge, vertical or slanting slightly backwards. The rump was a quarter-cylinder with transverse axis.
I apologize for pulling a clumsy trick in the next picture! I couldn't find any Poser-suitable models of the '47-49 Studie, so I used pictures to suggest the pattern.
Here's a model of the airplane-nose '50 which makes the same point, though both ends have departed from pure wedginess.
The point is: In '47-49, Studie had wedge shapes, head shapes, on both ends. This was an absolute first, except for a very few custom "boattail" sports cars. All other '47 cars, even the halfway radical Kaiser, stayed with conventional rumps.
After '49 these conventions broke down entirely. Some fronts became rumps, some grew tits, and then the Edsel ..... But mostly, all three boxes became literal rectangular boxes, losing the horse pattern altogether. Labels: Grand Blueprint
The current icon shows Polistra using a Personal Equation Machine.