49ers announce new red alternate throwback jerseys for 2021 to honor their 75th season in NFL

Ranking NFL's current throwback jerseys: Eagles' perfect 'Kelly Green'; high marks for 49ers, Patriots

8 NFL throwbacks that should return and 4 that should stay out of sight

Throwback uniform - Wikipedia

Jersey Unboxing

NFL Week 4 Uniforms: Black Helmets for Saints & Commanders, Throwbacks for Giants, 49ers + More – SportsLogos.Net News

Ranking the current alternate uniforms of every NFL team

San Francisco 49ers 75th Collection

Ranking the current alternate uniforms of every NFL team

NFL uniforms 2019: Uni Watch changes, design updates - Sports Illustrated

Cleveland Browns unveil white alternate helmet