The 1951 Cosmopolitan is of interest because, unlike typical model year facelifts, I think it was better-looking than the original design. The changes were simple. Mostly a different grille and side trim.
I discuss this below in the Gallery.
1949 Lincoln Cosmopolitan Sport Sedan - Mecum Auctions photo
Not a great photo, but the best I could come up with in May 2025. The paint is too shiny, and those wire wheels are not stock 1949, as best I can tell. Major items that were changed are the grille and the side chrome. The grille seen here was criticized as having a "sad" look, due to its upper frame falling away from the center to the sides. It was replaced in 1950 by a design with horizontal bars. And that grille was redesigned again for 1951. The side chrome trim above the front wheel opening was an odd touch that makes little sense to me. It's simply an accent that does not contribute to an overall design theme. But it was retained for the 1950 model year.
1951 Lincoln Cosmopolitan Sport Sedan - car-for-sale photos
First, some views of a Cosmopolitan in a natural setting. This is what the redesigned grille looks like.
The chrome strip along the body's lower edge was added in 1950. The bold, 1951 strip makes design sense as it (1) helps tie front and rear, and (2) also helps reduce potential slab-sidedness, a problem on several 1950-vintage American designs.
Rear quarter view. Compare to the 1949 Cosmo in the following image.
Same 1949 Cosmopolitan seen above. Aside from a different bumper than for 1951, the main difference is the round taillights.
1951 Lincoln Cosmopolitan Sport Sedan - car-for-sale photos
Now for a set of "studio" photos for a partial walkaround.
The basic shape was designed while Bob Gregorie was still in charge of Ford Motor Company styling. For most of his career there he was forced to deal with short wheelbases. Finally, following the war, he was given longer ones -- in the case of the Cosmopolitan, 125 inches (3175 mm).
By 1951, car glass technology allowed large, curved backlight windows. The 1951 Cosmo retained the 1949 three-segment backlight, perhaps because of the curves at each side were too strong for shaping a one-piece version.
The central trunk lid crease adds interest. And the rounded ends of the taillight assemblies echo the rounded body forms: better than the circular tail lights of 1949-50.
A large car, but surprisingly graceful.
That vertical element atop the front of the side chrome isn't really necessary.