How the Pittsburgh Pirates sparked a uniform revolution in the 1970s - ESPN

Pirates' 1970s mid-season uniform switch - old cap and/or helmet used with new uni - Sports Logo News - Chris Creamer's Sports Logos Community - CCSLC - SportsLogos.Net Forums

1970's Pittsburgh Pirates Uniforms Balance of Collection., Lot #81545

One more time for The Infield

How the Pittsburgh Pirates sparked a uniform revolution in the 1970s - ESPN

Pirates Made Uniform History – FOB Sports (Friends of Bob)

Mueller: Bonds' omission from Pirates' inaugural Hall class a swing and a miss

MLB Archives - EssentiallySports

Rumor] Pirates to bring back 70s throwback uniforms for 2016 season to replace Sunday Alternates. : r/baseball

Out of Left Field

Meet the Savannah Bananas, who wow fans and have MLB's attention - Los Angeles Times