This looks like a wonderful slice of personal history! Based on the clothing, the vehicle, and the film quality, this is a vintage 35mm color slide, likely from the late 1940s or very early 1950s.

Here is a breakdown of what we can see:

The Vehicle

The car is a late 1940s convertible, characterized by the heavy chrome trim and the rounded "fender" styling typical of that era. Specifically, the chrome "spear" along the side and the badge visible near the hood suggest it could be a Packard or a Buick from roughly 1947–1949. The dark paint and tan canvas top were a classic, high-end combination for the time.

Fashion & Style

The two women are dressed in quintessentially post-WWII mid-century fashion:

Dresses: They are wearing "day dresses" with cinched waists and mid-calf hemlines. The stripes and floral patterns were very popular for summer outings.

Footwear: Notice the "wedge" style sandals (the red pair especially). These became a major fashion staple in the 40s because they were more practical than stilettos but still stylish.

Hairstyles: Both have their hair styled in soft, pinned-back curls or "victory rolls," which were the standard of glamour during that decade.

The Photography

The vertical scratches and dust "specks" on the image suggest this was scanned from a 35mm Kodachrome slide. Kodachrome was famous for these rich, saturated reds and deep blues, which is why the colors still look so vibrant decades later.