A fine 1930 air mail from North Battleford. Saskatchewan to Dorking. Surrey franked with a 5c Canada Air Olive (SG 274). NORTH BATTLEFORD. SASK CDS on front and WINNIPEG. MANITOBA CDS on reverse. Also on reverse ‘SAVE TIME/USE AIR MAIL’ slogan cancel. On front. ‘POSTAGE DUE/2d’ stamp added and cancelled with a DORKING CDS. ‘2d’ hand stamp also applied. Canada Air Mail promotional cancel on front. Very interesting example.