The intent of the poster was to convey a message from the King to his people, to assure them that ‘all necessary measures to defend the nation were being taken’, and to stress an ‘attitude of mind’ rather than a specific aim.
At the end of August 1939 three designs went into production… The first poster, of which over a million were printed, carried a slogan suggested by a civil servant named Waterfield. Using the crowns of George VI as the only graphic device, the stark red and white poster read ‘Your Courage, Your Cheerfulness, Your Resolution will Bring Us Victory’. … The third design, of which over 2.5 million posters were printed, simply read ‘Keep Calm and Carry On’.
… The ‘Keep Calm’ posters were held in reserve, intended for use only in times of crisis or invasion. Although some may have found there way onto Government office walls, the poster was never officially issued and so remained virtually unseen by the public – unseen, that is, until a copy turned up more than fifty years later (2001) in a box of dusty old books bought in auction. (Barter Books)
The ‘Keep Calm Carry On’ image is in the public domain according to Wikipedia.
HEREis free download of the poster for those that want it provided by simplefreshdesigns.com