Lot 521 Canada

1929 (21 May) Printed airmail cacheted cover Edmonton to Grande Prairie to Alberta, bearing GV 2c green defin tied by ADVISE CORRESPONDENTS OF YOUR CORRECT ADDRESS slogan cancel and CANADA COMMERCIAL AIRWAYS / VIA AIR NORTHERN ALBERTA label in black on reverse tied by USE AIR MAIL boxed h/s in blue along with arrival b/s. Fine. Unitrade CL47.