'Work hard to win the battle of the Atlantic - but don't...', WWII poster, between 1939 and 1946. Creators: Central Office of Information, Unknown.
3-072-744 - Heritage Art/Heritage Images
'Work hard to win the battle of the Atlantic - but don't overwork your tongue. Never mention sailing dates, cargoes or destinations to anybody', World War II poster, between 1939 and 1946.