Ranking NFL's current throwback jerseys: Eagles' perfect 'Kelly Green'; high marks for Patriots, 49ers
Last time Black Alternates were worn? : r/49ers
New Orleans Saints - Wikipedia
49ers announce new red alternate throwback jerseys for 2021 to honor their 75th season in NFL
Social Recap: 49ers Players React to All-white Throwback Uniforms
49ers considering alternate throwback helmet for 2022 season : r/49ers
Ranking the alternate uniforms of every NFL team: Rams, Ravens top impressive collection of third jerseys
49ers confirm they will announce alternate 'throwback' uniforms on Wednesday - Niners Nation
49ers wish to wear white throwback uniforms at Super Bowl - Niners Nation