The International Postal Supply Co. of New York held the main contract for supplying the Canada Post Office with mail marking machines during the 1902-1919 period. Nevertheless in 1910, the Canada post office ran trials in Toronto, Ottawa and Montreal of a new prospective machine. It is believed that these trial machines were made by the Universal Stamping Machine Company. Further trials were made in 1912, and then Universal machines were rented, with a few being added each year. For now, we document only the period prior to July 1, 1919. On that date, the contract for International machines was dropped, and Universal machines proliferated in Canada.