Using its plastic car bodies, a new 'Dyn-O-Charger' or simply 'Dyn-O' slot cars series were at first issued in a yellow box. One of the company's earliest promos was the Dodge Coronet. MPC's offerings were marketed as 'Zingers', and featured comical stubby and swollen looking vehicles with huge drag racing engines. The Canadian-market offerings were among the first model kits to include both English and French documentation on the boxes and instruction sheets. Note the paint is metalflake the color of the underbody is not. Chrysler Museum, Auburn Hills, Michigan. From this time forward, MPC mainly profited from kits first and promotional models secondarily.