 Winckler was also the licensing agent for many early TV and movie related die-cast cars and plastic model kits for Playing Mantis, including Speed Racer, Supercar, Land of the Giants Spindrift and others.Winckler was instrumental in obtaining the Speed Racer license for Playing Mantis since the U.S. licensee Speed Racer Enterprises initially rejected the offer from Playing Mantis, and Winckler had to go straight to the original Speed Racer licensors in Tokyo, Japan, Tatsunoko Production Co., Ltd. to secure the license.The Speed Racer Playing Mantis cars were the first "officially licensed" die-cast vehicles of Speed Racer sold in the U.S. thanks to Winckler.