CANADA PATRICIA AIRWAYS SIOUX LOOKOUT TO PINE RIDGE & RED LAKE, 1926, (25c) GREEN & RED ON YELLOW FLIGHT COVER, #CL13, July 8, 1926 d.s, flown by H. A. "Doc" Oaks, pencil notations, corner crease, fresh and fine-very fine, cat. $125.00 as first flight cover, Unitrade @ $100.00 CAD, ex. Michael Rogers