15 inch guns at Imperial War Museum

From the plaque:
”These two guns are the only surviving examples of a modern battleship’s main armament on display in this country. [UK] They were originally mounted in two battleships of the Revenge class. [Left: HMS Ramillies, Right: HMS Resolution] Each gun weighs 100tons (102 tonnes). At maximum range they could fire a 17 ¼ Cwt (876 kg) shell a distance of 18 ¼ miles (28km).”