College football uniforms and helmet designs changed significantly ... matte blue and black helmet versions of the look, too. USC debuted its Trojan-head primary logo on its cardinal helmet ...

USC briefly went to chrome helmets in 2014 and 2015 before returning to the classic look. According to helmethistory.com, the Trojans logo first appeared on football helmets during the 1972 season.

Whether it was the uniform, or more probably, assembling arguably the greatest college football ... same logo that appears on the current helmets. Uniform changes are a big topic for USC fans.