I’ve done so many of these sleuthing posts that it’s getting difficult to find photos that I haven’t already seen.
Fortunately, I found another one, and before I get going, credit where it’s due. Here’s where I found it:
So your first clue as to the date is in the tweet. However, sometimes those aren’t correct, so I figured I might have to look at years surrounding 1951. One clue that it has to be before 1952 is in the little bit of “shade” that’s just above the bleacher wall in center field. Hitters had been complaining about not being able to see the ball in all the white shirts in the center-field bleachers at Wrigley for years.