1924/32, semi-official airmail collection,, most hinged though with a few never hinged examples noted, with various airlines represented including Laurentide Air Service, Elliot-Fairchild Air Service showing the “filled-in wing” variety, Fairchild Air Transport, including vertical and horizontal tete-beche pairs, Patricia Airways & Exploration, Western Canada Airways, Yukon Airways, Cherry Red Airlines, etc, the odd small flaw, chiefly fine.
