Note the process in process. You can almost sense Bowerman working through design issues.
On the upper shoe, the waffle sole material did not cover the entire front 'plate' and you can see where he cut and attached a small piece to complete the covering at the front.
And at the back, note that the heel is a square in a rounded space; it is 3x3 'waffles' in size.
The Master at work on his masterwork.