Chad,
All the middle 1950 Nash products had that enduring, timeless kind of ugly, much like the late 40's / early 50's bullet nosed Studebaker.
At one time in the late 60's I bought a little Metropolitan (Nash bodywork, Austin A40 running gear) for just $50 with 11,000 miles on it. My daughter was pre-school at the time and called it the "Metropotomus." Wish I had it now, they are worth a lot today. It had the dash mounted shift lever just like yours -- man those things can get really sloppy and remote feeling!
My guess is your Nash is a '54 or '55...but I'm no expert.
Chuck