Sergei Diaghilev Ballet Russo Travelling Show WW1 Photo Postcard

news14 -32 This is a totally unique undated but appears 25 years ago origin postcard by an unnamed award winning photographer of a real photo souvenir of Sergie Diaghilev (of Ballet Russo fame) and his travelling dance show leaving Chicago in the heart of the war in 1916 and was sourced by a collector of some of the most  historic photo manipulation art works & famous groundbreaking news award winning photographs in history (see his full collection he sourced being sold at my store) which this particular postcard appears to originate from an exhibition at the Barbican in London as a souvenir for visitors who had travelled to see the photo on display and is unused and mint (same as new)