Posted By:
fkwThe sticker is from a boardgame called "Major League Ball - The Indoor Baseball Game Supreme" from the National Game Makers of Washington DC.
The complete "cards" (diecut player with sticker attached) are known as 1921-30 Major League Ball Die-Cuts (page 234 in the 2008 SCD)
IMO If you can not remove the sticker it will hurt the overall value of the card.
The diecut game cards this sticker is from are generic poses of players with a blank bottom square, and the original owner of the game received stickers with the players name and stats etc. and they stuck the stickers in the bottom square of the diecuts.
Maybe someone can show an example of the diecut card, I dont have any right now.
PS. I emails the seller in the last couple hours of the auction and told them this info, but I dont know if they had enough time to update the info.