HORNICTVÍ Mine-plough machine. By Jeffrey Manufacturing Co., Columbus, Ohio, USA, ca. 1900  Cast-iron oil lamp made at an ironworks company in Komárov, 2nd quarter of the 19th century.  Pieler lamp to indicate methane in mines, manufactured by Friemann-Wolf, Belgium, ca. 1900
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National Technical Museum Kostelní 42, 170 78 Monday: closed
Days with reduced admission fee in 2023February 15, May 18, July 5, September 2, September 28, October 28, November 17, December 17 Prague Visitor Pass
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