The Five-cent Prexie
There was a special printed matter rate for newspapers and periodicals sent to Canada of one-cent per four ounces from February 1, 1908 to December 31, 1958. The rate applied to bulk shipments addressed to one post office or to single pieces. This wrapper from 1945 would have been around multiple copies of the Advent Review and Sabbath Herald, the total weighing over 16 but not over 20 ounces. These would have been distributed to individual addresses by the Kelowna post office.
Third class rates for greater than the basic weight could require five cents postage.
This envelope from 1940 is marked "printed matter," and could have contained a catalog weighing between four and five ounces at one cent per ounce or fraction thereof. This rate was in effect from April 15, 1925 until January 1, 1949.
A box, most likely weighing between four and five ounces when its contents were present, was probably mailed between January 1, 1949 and August 1, 1958, when the rate was two cents for the first two ounces, and one cent for each additional ounce.