World War 1, Frankfurt, Germany. Series #4 of 4, a pane of 9 designs sold in the glassine shown, for 30 pfennig. “Commemorative Stamp for War Welfare”. The pane was folded to fit in the envelope; surviving panes are all very weak at the perforations. See Jackson For God, Kaiser, and Fatherland, pg. 86 for captions.