Official match ball of the 1962 World Cup in Chile
This model was well-known as Crack. It consisted of 18 leather long panels. The color was the pumpkin yellow.
As you can see in the picture below, the ball had a bladder in order to be inflated as the current balls.
In the picture below is shown an official poster of that time with the Crack ball.
Because of its long panels, the ball had to pass a lot of tests to verify that it was totally round and was possible to play soccer.
Pele playing with the official World Cup ball 1962, the Crack.