The World's Grain Exhibition and Conference held at Regina, Saskatchewan, from 24th July to 5th August, 1933, was an event of considerable importance. The Department agreed that the event should be commemorated by the issuance of a postage stamp depicting some phase of Canada's great grain-growing industry. The Post Office Department, unable to prepare an entirely new issue, decided to overprint a quantity of the 20-cent red pictorial stamp first issued on 4th December, 1930. The British American Bank Note Company received instructions to manufacture and overprint a quantity of the 20-cent red stamp with a four-line inscription in blue reading: "World's Grain Exhibition and Conference Regina, 1933."
View of the Canadian prairies, showing grain harvesting by tractor, with grain elevators in the distance.