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Dortmund Zeche Gneisenau. DoppelbockFrdergerst der Zeche Gneisenau in Dortmund originally uploaded to de by author self made by author Benutzer Tbachner Public domain History of de Sep Benutzer Tbachner Byte Doppelbock Frdergerst der Zeche Gneisenau eigene Aufnahme September Zentralfrderschacht Gneisenau