page_title: 21 cm SK L/40
hierarchical_section_title: 21 cm SK L/40
caption_attribution_description: Rear gun turret on SMS Scharnhorst, sunk by British on 8 December 1914
context_page_description: The 21 cm Schnelladekanone Länge 40, abbreviated as 21 cm SK L / 40, was a German naval gun developed in the years before World War I that armed a number of the Imperial German Navy's protected and armored cruisers. Later spare guns were adapted to railway guns during World War I and later employed as coastal artillery during World War II.
context_section_description: The 21 cm Schnelladekanone Länge 40, abbreviated as 21 cm SK L / 40, was a German naval gun developed in the years before World War I that armed a number of the Imperial German Navy's protected and armored cruisers.  Later spare guns were adapted to railway guns during World War I and later employed as coastal artillery during World War II.
caption: A twin turret aboard SMS Scharnhorst
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