Canada CL13i

1926 (July 1) (25c) Patricia Airways, Style One, an exceptional corner margin example, showing imprint and Series “2” number at top left, with “RED LAKE” marginal inscription INVERTED ERROR that is noticeably shifted horizontally (16mm) to one side; green route inscription. Well centered, brilliant fresh colour and full immaculate original gum. A superb airmail rarity of this popular airline company, Extremely Fine, Never Hinged (Unitrade CL13i variety; catalogue value $6,000+)

Catalogue value is for the basic airmail stamp with inverted RED LAKE marginal inscription; no premium is given for the remarkable shift.