Category:Elswick BL 12 inch 40 calibres naval gun

English: The Elswick 12 inch naval gun of 1901, 40 calibres barrel. Served the UK as BL 12 inch Mk IX, on pre-Dreadnought battleships, M class submarines and as railway guns in WWI. Served in the Imperial Japanese Navy as Type 41 12-inch (305 mm) /40 caliber naval gun.