German Steel Mining Headgear Hoist Tower
A German headgear located in Dortmund and designed by Aug. Klönne. This headgear is made out of steel frame carrying hoisting ropes used in mining. The towers are located at the mouth shaft.
Encyclopaedia Britannica (11th ed., vol. 18) (New York, NY: The Encyclopaedia Britannica Company, 1910)