Source: 49ers to introduce new alternate uniform for 2018 - Niners
49ers Unveil Alternate Throwback Uniforms at Annual State of the
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Photo gallery of 49ers new throwback alternate uniforms for 2018
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49ers to unveil new alternate jersey on Thursday - Niners Nation
49ers confirm team will debut alternate throwback uniforms on
49ers Unveil Alternate Throwback Uniforms at Annual State of the
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Photo gallery of 49ers new throwback alternate uniforms for 2018
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Photos: The 49ers have alternate uniforms for the first time ever