Posted By:
CoreyRS.hanusDan,
Maybe then I will learn something I have never before known to be true, but I am not aware of single instance of a vintage poster or lithographic print issued a particular year that came in varying dimensions (at least in regard to the 19th and early 20th century).
I remember some years ago being offered the Currier and Ives print "The American National Game of Baseball". I called a nationally known print expert I knew for advice whether the print was original. The first question he asked me was its dimensions. When I told them to him, he said they are different that those of known originals so I shouldn't waste my time further.