Again from the book Idrotten i Finland (1906). This time rad ball or “Velocipedboll”. Just more proof that this is all much older than the Pacific North West wants us to believe.
Old Helsinki bike polo
According to Lefa at cyclingnsht.blogspot.com this photo was published in a book titled Idrotten i Finlad (1906) by Ivar Wilskman. Idrotten i Finlad translates to Sports in Finland. Kaisaniemi park is in Helsinki, Finland and H.V.K. stands for Helsingfors Velocipedklubb.
Looks to me like they are playing bike polo in the street, or at the very least not in the grass.