the car belonged to his Aunt Betty, born around 1913. She was a beautiful woman who was a little more "progressive" than most girls in the 1920's and 30s.
She got a private pilots license in the 30s and was what was known as a "flapper". The picture was taken on Popular Ave. Hackensack, NJ. at her parent's house.
I'm going to guess its a 1933 Olds.
Here's what other people knew:
Olds came in two sizes, the six at 115" wheelbase and the eight at 119". I guess the same car with a longer hood. A rare car even when new. In the convertible body style Olds built 317 sixes and 267 eights. I think the car here is a six - because the rear edge of the hood is just forward of the rear end of the front fender crown. On the eight they are about level with each other.
the "Sparrow" hood ornament makes this a 115 inch wheelbase six-cylinder 1933 Model F-33 33418 2-door 3 passenger convertible. A 119 inch wheelbase straight eight-cylinder L-33 looked similar, but had a much different hood ornament..
While the 1934 Oldsmobiles shared the same body and trim with the 1933s, no 1934 Model 34418s (convertibles) were built with six-cylinder engines (F-34), and again, the L-34 eight-cylinders had a different hood ornament.
According to the Standard Catalog of American Cars 1805-1942 (second edition), the F-33 in the photo had a cast iron block inline L-head six-cylinder, displacing 221 cubic inches. It had a 5.3 to 1 compression ratio, mushroom valve lifters, a downdraft Stromberg EC-22 carburetor, and developed 154 ft.-lb. of torque.