Wrigley Field historical sleuthing: 1970s aerial edition

You have probably seen this photo before; it’s floated around the internet for quite some time.

Recently, while searching for more photos to sleuth, I came across it here:

Here's a beautiful aerial shot of Wrigley Field from the 1970s. Stunning. #EverybodyIn pic.twitter.com/q0C9E7Clbo

— BaseballHistoryNut (@nut_history) August 14, 2019

Just to give you a larger version to look at while I explain the sleuthing process, here it is:

The key here is not to look at the scoreboard, but instead the marquee.