The QF 6 inch 40 calibre naval gun was used by many United Kingdom-built warships around the end of the 19th century and start of the 20th century.
In UK service it was known as the QF 6 inch Mk I, II, III guns, As the Type 41 6-inch (152 mm)/40-caliber naval gun it was used for pre-dreadnought battleships and armoured cruisers of the early Imperial Japanese Navy built in UK and in European shipyards
It was Guns like this that help defeat the German Heavy Cruiser Graf Spee during the Battle of The River Plate in 1939
The Ship in the background is HMS Cavalier
Historic Dockyard Chatham Kent UK
Canon 500D 4 shots (Raw) edited in Photomatix pro