Photos: The 49ers have alternate uniforms for the first time ever - Footballscoop
49ers Unveil Alternate Throwback Uniforms at Annual State of the Franchise Event
Do NFL teams wear new uniforms every game? - Quora
Photos: The 49ers have alternate uniforms for the first time ever - Footballscoop
Social Recap: 49ers Players React to All-white Throwback Uniforms
Do the 49ers have throwback uniforms coming in 2018?
49ers reveal throwback alternate jerseys 2018 - Niners Nation
49ers Throwback Inspired Alternate Uniforms
Ranking NFL's current throwback jerseys: Eagles' perfect 'Kelly Green'; high marks for Patriots, 49ers
Ranking NFL's current throwback jerseys: Eagles' perfect 'Kelly Green'; high marks for Patriots, 49ers
History of the San Francisco 49ers - Wikipedia