Vintage 1960s ? STP Indy Car / Logo Promotional Toy in Original Packaging NOS

Offering an original vintage STP promotional toy. Includes 2 foam pieces (STP Logo and Indy car) and a metal weight. Sealed in original plastic packaging. I believe this is circa 1960s or early 1970s. The weight attaches to the front of the car but I am not sure how the toy works or whether additional pieces are required. Sold as-is. Very cool piece

Logo measures approximately 3 1/4" by 5" at widest points. Car measures approximately 1 1/2" by 6 1/2" at widest points.

Condition: NOS condition still sealed in original plastic. Logo does appear to have a horizontal crease line.