I am really enjoying this thread.  It reflects why I enjoy memorabilia so much more than cards. I have these four large size advertising items below.  I realize that although I have never seen them before does not mean others have not.  The Berra saving bonds poster I have seen in the national archive web site, but not anywhere else. 
http://www.archives.gov/publications.../baseball.html They have prints of it for sale.  I have never seen any other examples of the two Japanese pieces featuring Oh and Nagashima.  I am told one is a movie 1960 poster while the other is an advertising poster for a late 1950’s Japanese baseball magazine? The Drysdale piece I assume is an advertising piece for a sporting good store?  Nonetheless these are the only examples that I have ever seen of these items.  Has anyone else ever come across other examples of them? If so could you please share your knowledge?  Thanks!