BL 16-inch Mk I naval gun
…shorthand) meaning 45 times the 16-inch (406 mm) bore – 60 ft (18 m) long. These wire-wound built-up guns had originally been planned for the cancelled G3-class battlecruiser design upon which the Nelson class drew. Sir W. G. Armstrong Whitworth & Company at Elswick, Vickers at Barrow-in-Furness, William Beardmore & Company…