Pictured above is a post-1932 era Model A and B Ford Champion 3X spark plug box. Note the colors on the box and end flap. Also note that the end flap specifies both Model A and Model B Ford.
This is the earliest Champion 3X box I have in my collection.
The current reproduction Champion 3X replacement plug and box are shown above.
Pictured above is the early V8 era Champion C4 replacement plug which came in an all-blue box.
Pictured here is the era replacement AC brand number 575 plug for the Model A Ford. Note the box designation for Model A Ford.