I found this little curiosity in an old Ottawa Citizen and the question was – why was one photo doctored?
Rocket’s 600th goal was scored on Nov. 26, 1958, against the New York Rangers, while his 626th, his final goal, was scored on April 12, 1960 against the Toronto Maple Leafs. No one knew his 626th would be his final goal until the following September during training camp, so 626 wouldn’t become a milestone until he retired that following fall.
So the photo showing 600 goals is probably the real thing. Unless someone had a crystal ball.