How have FIFA World Cup balls evolved over the years?

Tiento and T-Model balls were used in the 1930 FIFA World Cup, while the Federale 102, made from 13 hand-stitched leather panels, featured in the 1934 edition. Brazil's 1950 World Cup used the Superball Duplo T, the first ball without laces. Chile's 1962 World Cup introduced the Mr Crack ball, the first ball fitted with a latex valve.