1950s Pontiac Sedan
that's definitely a '55 Pontiac 2 door sedan
When I was a kid the old man bought a 55 2 door similar to this. He liked it but it was too small for our family. There are a few of these running around Denver, 55s and 56s. More rare than Chevies but easier to buy price wise. Glass, doors and many other parts share with the Chevies.
These mid 50's Pontiacs got totally overshadowed by the tri five Chevys. They are great cars and have a great look. They even had a "Nomad" Safari wagon. Nice cars.