Ranking NFL's current throwback jerseys: Eagles' perfect 'Kelly Green'; high marks for Patriots, 49ers
Last time Black Alternates were worn? : r/49ers
2016 San Francisco 49ers season - Wikipedia
49ers' new alternate uniform is unoriginal, outdated - ABC7 San Francisco
49ers officially unveil black, red and gold alternate uniform for 2015 - Niners Nation
49ers uniform undergoing several changes for 2022, could be setting stage for return of red helmets
49ers Unveil Alternate Throwback Uniforms at Annual State of the Franchise Event
2016 San Francisco 49ers season - Wikipedia
49ers to Wear Black Alternate Uniforms vs. Minnesota Vikings
Ranking the 2016 NFL Color Rush Jerseys from Worst to Best