This photo could have come from just about any time pre-expansion, as the Wrigley Field scoreboard has room for only 16 teams as shown.
One by one, though, I’ll show you the clues that made finding this moment relatively easy.
First, the center field bleachers are closed off for a hitters’ background. That happened April 20, 1952, and since that date the CF bleachers were opened just once, for the 1962 All-Star Game.
So now we’re in the mid-to-late 1952 through 1960 range.
One thing that defined the major leagues in that era was franchise movement.