Yartzev Defense Workers Look at the Results – Double Your Efforts to Produce Shells 1916. Fascinating early use of photography in a poster used to document enemy losses and in ‘seeimg is believing’ mode to encourage munitions workers. Aerial army photo taken on March 25, 1916 shows huge craters riddling the front line looking east from Jazlovetz. Insert is a drawing of German trenches destroyed by Russian shells. Poster was aimed at Petrograd munitions wokers. Rare. 27×38 near mint, conservation backed.