1939 NORTH ATLANTIC AIR SERVICE - First Flight Aerogramme addressed to Scott Stamp & Coin Co, New York from Stanley Gibbons, London with 7d & 8d KGVI defins and machine cancel 'LONDON WC1' on 29th June 1939, received 'NEW YORK NY 24 on July 1st 1939. Returned to Stanley Gibbons with 30c Air stamp (SG A852) and circular date stamp 'NEW YORK N.Y. STATE, W.43RD ST.' on July 5th 1939, received in London on 10th July 1939. No contents / message. Unusual cover. {C} (Start Price / Minimum Bid) = £32.00)