Pirates' alternate uniform harkens to early '70s

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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

Uniforms and Logos Pittsburgh Pirates

Pirates' alternate uniform harkens to early '70s

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Heritage Uniforms and Jerseys and Stadiums - NFL, MLB, NHL, NBA, NCAA, US Colleges: Pittsburgh Pirates Uniform and Team History

1976 Pittsburgh Pirates Uniforms Pittsburgh pirates baseball, Cleveland indians baseball, Mlb uniforms

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