Forbes Field behind left/left center field. Seller said it was 1911-1915 but I really have no idea. Can't find any other shots with these lights showing. Maybe somebody else is good at dating stadiums?
Really beautiful shot with the model T. Unique as it was taken beyond the outfield rather than in the stands pointing to the outfield like 99% usually are. Things like this are my favorite. Mounted to a cabinet card, but cropped for better viewing experience.