According to this website the photo on the poster was taken in June, 1913, at Grove City (his fatal flight)...
https://historyandmemorabilia.blogsp...rican.html?m=1
..., but according to the timeline of his flights, the exhibition in Clarion took place in September 1912.
If in fact the photo was taken in Grove City, that would have to mean the poster is a fantasy piece.