Canada 1898 #53 Jubilee 3c precancel (Style T) on cover,
Shown with permission of owner (not me).
From presentation page:
Quote:
Possibly improper use of a precancel on first class mail Back stamped at Windsor [Ontario] Mar 06, 1898 and destination Mar 06, [should read Mar 07] 1898.


Additionally I found this web page, 'The Uses of Precancelled Stamps of Canada', that is quite informative.
http://www.camacdonald.com/precance...ct-User.html