Foreign Letter Postage Rate GPOOriginal vintage advertising poster for the GPO General Post Office 4d Minimum Foreign Letter Postage Rate featuring a stylised image of a postman wearing a hat with the 4 and D in red as his nose, moustache and eye over a map of Europe and globe lines in the background, the text as a stamp and diagonally below with the GPO crown logo and details The Commonwealth rate of 2 d applies to letters for the British Commonwealth generally and to certain