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Polnischer Ingenieur
Powązki Military Cemetery
Jan Koss (* 2. January 1896 in Warka; † 29. January 1949 in Dorotowo, Warmian-Masurian Voivodeship) was a polnischer Ingenieur. He was 53 years old. He was awarded the Officer of the Order of Polonia Restituta. His cause of death was traffic collision. He was buried at Powązki Military Cemetery.