Canada CL13i Semi-Official Airmail catalogue value $500+)

catalogue value $500+)

a rare and Extremely Fine essay

London Paid MY 12 79 transit in red

both with full margins and cancelled by oval mute grids for the Seven and One Half pence letter rate to the United Kingdom (effective August 1

a beautiful complete set of trial colour die proofs

Canada CL13i Semi-Official Airmail catalogue value $500+)1926 (July 1) (25c) Patricia Airways, Style One, green route inscription; an extraordinary mint vertical strip of three, lower left corner margin Series 2 number and showing full Red Lake and inscription notes at left, displaying the rare INVERTED "RED LAKE" marginal inscription on all three and of which is additionally shifted horizontally (16mm) to one side to dramatic effect. Well centered with bright colours on fresh paper and displaying full