Address Your Letters Correctly Tom Eckersley GPO WWIIOriginal vintage advertising poster Address Your Letters Correctly and Clearly and Completely featuring a bold design by the notable British graphic artist Tom Eckersley (1914 1997) depicting the text on two envelope shapes highlighted by a red arrow marked 1 pointing to a white envelope with a blue postage stamp that has been franked on it and a red arrow marked 2 pointing to the black shadow of the envelope below, a red post box and its shadow