Cuba 1957 - Sc C172 (EDIFIL 721) on First Day Cover.
Stamp issued to commemorate the 30th Anniversary of the 1st. Airmail service from Key West to Havana on a beautiful Pan American Airways 30th Anniversary cacheted, addressed First Day Cover. There is a very small sealed tear at the upper margin of the envelope, just to the left of the dividing line between the blue and the white color sections of the cachet. Also a very small loss of paper at the back flap, most probably caused by having been previously affixed to an album page. Scarce cover.