Credit where it’s due, I found this photo at this link on the Baseball History Comes Alive site. I had never seen it before.
It was taken at an Old Timers’ event at Wrigley Field, and it didn’t take too much sleuthing to find the date. Many of the players from the 1907 Cubs World Series champs reunited for ceremonies at Wrigley on June 23, 1937, before a game against the Giants. (The Cubs wound up losing the game 8-4.) Incidentally, the Tribune reported that the old time Cubs players “donned Cubs uniforms and cavorted in an infield drill before the .