In the fall of 1918 new logos, the first marks of Polish air force, were painted on the airplanes captured from the German and Austro-Hungarian airports, after the black crosses, the hitherto symbol of nationality status, were covered with paint. The so-called Kraków logo, co-created by Florer, were given to the First Combat Escadrille, the first Polish Air Force unit. The Kraków logo consisted of the red letter Z against a square white background, and it was painted both on the aircraft fuselage and on the wings.


                                                                               
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