The BL 12 inch Gun Mark XI and Mark XII were British 50-calibres naval guns that were mounted as primary armament on dreadnought battleships from 1910.
The BL 12 inch Gun Mark XI and Mark XII were British 50-calibres naval guns that were mounted as primary armament on dreadnought battleships from 1910.
The BL 12 inch Gun Mark XI and Mark XII were British 50-calibres naval guns that were mounted as primary armament on dreadnought battleships from 1910.