PP38a     $200.00

1925 Canadian Grettir Algarsoon derigible flown cover. Airship was supposed to fly to the North Pole, but the expedition was cancelled. This cover was supposed to be flown on a test flight from London to Liverpool, but was cancelled after the airship was determined to be incapable of its planned mission. Only about 100 specimen envelopes produced according to the "American Air Mail Catalogue" 7th edition, Vol.2 which catalogues it at US$300.00.