Looks like the founding of the Finnish Social Democratic Party based on reverse image search: https://www.versobooks.com/blogs/3511-the-social-democratic-party

Looks like the founding of the Finnish Social Democratic Party based on reverse image search: https://www.versobooks.com/blogs/3511-the-social-democratic-party-organization https://www.versobooks.com/blogs/3511-the-social-democratic-...