I found this Youtube video of the 1947 World Series...were you can see the Coca Cola Classic billboard in the video ( @ 3:42 mins into the video) matching up to my photo.
https://www.youtube.com/watch?v=1X_lWmsZX3Y&t=229s
I notice the zipper jersey in this image when looking around, but wasn't sure why they would switch from zipper to bottom up...
I thought it was too hard to tell ( for me at least) whether my snapshot image was showing "zipper style" or "button up"
"zipper style" from Opening Day
1947 Jackie Robinson game used "bottom up" used in World Series
https://sports.ha.com/itm/baseball-c...a/7220-50001.s