Yup, I was close, it's an Olds, 1946-1948. Has to be those years, since US auto manufacturers were not building cars during WWII, and in 1949 there was a complete restyle of all GM cars. But, I was half-right, because the Pontiac and Olds used the same body, just with slightly different tweaks. This shot shows me the arch of the rear wheelwell being more rounded as opposed to squarish like the Pontiac. Also, the Pontiac would have 3 ribs in the lower fenders. Here's a pic of a 1947 Pontiac (top) and a 1947 Olds (bottom) to compare.