The BL 6-inch Mark XII naval gun was a British 45 calibre naval gun which was mounted as primary armament on light cruisers and secondary armament on dreadnought battleships commissioned in the period 1914–1926, and remained in service on many warships until the end of World War II.
Casemate gun on HMS Warspite after the Battle of Jutland, June 1916
Single gun on CP mounting on cruiser HMS Enterprise
Experimental twin turret on HMS Enterprise, seen in 1936, which formed the prototype for twin 6-inch turrets for the Nelson-class battleships, as well as the Leander and Arethusa-class cruisers
Gunners load a casemate gun on battleship HMS Malaya, May 1943. The men at left carry cordite cartridges, still in their storage cases, on their shoulders
HMS Enterprise was one of two Emerald-class light cruisers built for the Royal Navy. She was built by John Brown & Company, with the keel being laid down on 28 June 1918. She was launched on 23 December 1919, and commissioned on 7 April 1926. She was the 14th ship to serve with the Royal Navy to carry the name Enterprise, a name which is still used in the Royal Navy today.
Enterprise in November 1943
Enterprise at Haifa on 6 May 1936
1936 photo showing the experimental twin turret
Cornwall sinking after a Japanese attack, Enterprise rescued some of her crew.