Cardboard window filler optional. As was tread on the tires, apparently! At least the owner had an AAA membership.
V I N T A G E P H O T O S — Written underneath these photos in the album I found them in is, "What a car." I don't remember anyone in my family ever talking about a 1931 Pontiac sedan, so I think it might have been borrowed or possibly belonged to a friend. The photo was dated 1946, making this car 15 years old at the time and a survivor of wartime metal drives. The lack of tread on the tires is a result of the times as well—I'd bet the owner had to use those tires for the duration of the Second World War, and even afterwards, rubber was in short supply. I'm pretty sure the inscription was sarcastic, judging from the bald tires, dented fenders, missing spare tire and the cardboard covering a broken window in the rear door. Even though it is, at first, a jalopy, a closer look shows it was rust free, and would be considered an "easy" restoration today. It's interesting that this '31 has a dividing trim piece on its radiator grille, as the divided grille would become a Pontiac trademark from 1959 until its recent demise in 2009, with very few exceptions.
Pontiac was introduced in 1926 as a companion marque to GM's Oakland division, but outsold the parent line almost immediately and replaced it completely in 1932. This '31 sported an L-Head (flathead, sidevalve) six cylinder engine, making 60 horsepower, a step up from a Ford Model A's 4 cylinders and 40 hp. The '31 offered a 112" wheelbase, also a step above the Ford's 106 inches. Beginning the next year, Pontiac offered its first straight-eight engine, basically the Oakland unit from the year before, and Ford rewrote history with its famed flathead V8.
• For a great pictorial site for Pontiacs 1926-49.
• There is this one, too.
• And here's the Wiki for Oakland-Pontiac.