During the early days of the Second World War Canadian Postal authorities believed that the stamps in use since 1938 should be replaced with a new issue featuring Canada's substantial contribution to war work. A new general issue to last for the duration of the hostilities was designed. Subjects depicting Canada's munitions, war supplies, shipbuilding, agriculture, her importance as a great air-training centre, and as a source of food were chosen for the pictorial stamps.
A Canadian corvette ready for launching. This scene displays the contribution of the smaller shipyards of Canada in building vessels for the Royal Canadian Navy and the Merchant Marine. The corvette was among the early weapons of the Second World War. These ships were engaged in action against submarines and proved to be invaluable aid, due in no small measure to their seaworthiness. Vessels produced in Canada were used to transport men and supplies to the different war fronts.