NFL approves alternate helmets for throwback uniforms: How that impacts the Eagles
Eagles' black helmets, explained: Why Philadelphia is going 'dark mode' on 'Sunday Night Football'
Philadelphia Eagles Unveil Kelly Green Throwback Uniforms After Images Leak – SportsLogos.Net News
Philadelphia - HELMET HISTORY
Tracking all the new NFL uniforms and helmets for the 2022 season - ESPN
NFL Throwback Uniforms: Ranking the 15 best vintage jerseys in league history
Ranking NFL's current throwback jerseys: Eagles' perfect 'Kelly Green'; high marks for Patriots, 49ers
Philadelphia - HELMET HISTORY
Philadelphians show out for Eagles' throwback kelly green jerseys - Axios Philadelphia