So-called Petschili registered cover from Deutsche Auslandpostamt China / German Offices China during the Boxer Rebellion period, sent to the Austrian warship SMS Zenta, which at the time was in Nagasaki, Japan. With Japanese ricepaper[silk?] label reverse. A bit worn, folded in center, good condition for a genuinely used piece from this period in Chinese/Japanese/German/Austrian history. Expertized twice by Mansfeld.