Some explanation on this design: [ame="http://en.wikipedia.org/wiki/Keep_Calm_and_Carry_On"]Wikimedia Error[/ame]
Keep Calm and Carry On was a poster produced by the British government in [ame="http://en.wikipedia.org/wiki/1939"]1939[/ame] during the beginning of [ame="http://en.wikipedia.org/wiki/World_War_II"]World War II[/ame], to raise the morale of the British public in the case of invasion. It was little known and never used. The poster was rediscovered in 2000 and has been re-issued by a number of private sector companies, and used as the decorative theme for a range of other products.