Rare c.1906-07 Chicago Cubs West Side Ball Grounds real photo postcard (read). Original Real Photo Postcard showing the Cubs at the West Side Ball Grounds. While I can not guarantee it I strongly suspect they are showing during either the 1906 or 1907 World Series. This image looks to have been taken around the same time as photos which can be found online that are attributed to the World Series although there seems to be some conflicting dating as to which World Series they were taken during (some are identified as 1906 while others are listed as 1907). In very nice condition with some light wear.