The Eighteen-cent Prexie
Registered letter to Canada
The rate for a first-class letter sent to Canada was three cents from September 1, 1931 until August 1, 1958, and the fee for foreign registry was fifteen cents from December 1, 1925 to January 1, 1945. Thus, from September 1, 1931 until January 1, 1945 the cost of a registered first-class letter to Canada was eighteen cents.
This registered cover was sent from Los Angeles to Sudbury, Ontario in 1939.