2015 Uni Watch NFL preview - Uniform changes, tweaks, alternates and throwbacks - ESPN
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Steelers tease everyone with announcement of new throwback uniform for 2018
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Pittsburgh Steelers Unveil 1979 Throwback Uniform - Sports Logo News - Chris Creamer's Sports Logos Community - CCSLC - SportsLogos.Net Forums
Steelers Unveil 1978 Throwbacks
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Minnesota Vikings - Wikipedia