Seattle Seahawks - Throwback Uniforms
Photos: The 49ers have alternate uniforms for the first time ever - Footballscoop
White-out jerseys for all 32 NFL teams
New Orleans Saints unveil new black helmets to be worn for at least one game in 2022 - ESPN
49ers debut new black alternate uniforms
2023 College Football Uniform Preview - Auburn Uniform Database
49ers Unveil Alternate Throwback Uniforms at Annual State of the Franchise Event
NFL Teams Debuting Alternate Helmets, Jerseys for the 2022 Season – NBC Los Angeles
Happy third anniversary to the 49ers black alternate uniforms - Niners Nation