The Pro-Spin series were made by "D F Duncan Sales and Promotions, Limited". The copyright date on the packaging is 1984, well into Donald F. Duncan Jr.'s Playmaxx years, although Playmaxx is not mentioned anywhere on the packaging. There are two models: The Slinger (imperial shape) and The Stinger (wing shape). The Stinger appears to be the origin of the Pro-Yo Bumblebee character seen on later Playmaxx products.
