When the Canadian National Exhibition rolls into Exhibition Place, the TTC converts Dufferin and Exhibition Loops into ad-hoc stations, complete with turnstiles, fair-paid zones, and transfer dispensers.
Over the years, the Ex transfers used a variety of styles taken from the rest of the system. The single thick stripe design tended to be found on the Bloor-Danforth Line, the Yonge–University–Spadina Line tended to use the stripless design, and the Scarborough RT apparently used the double-striped design.
Transfers issued at Duffering Loop were labelled "issued at west ent". The loop is a short walk from the Dufferin Gate, the west pedestrian entrance into the grounds.
Transfers issued at Exhibition Loop were labelled "issued at eastern ent". The streetcar loop used to be right in the middle of the ground's east side. The loop has since been moved north-east edge of the grounds and expanded, with the Direct Energy Centre being built on the old location.
And here's one that doesn't indicate which loop it's from.