Zeppelin 1936 USA-Cuba reg'd cover franked 2 x 20c + 15c Airmail stamps addressed to Habana. H/s Hindenburg First Flight & via Airship Hindenburg from Lakehurst to Frankfurt. B/s NY 9 & 10 May, Frankfurt 14 May, Habana 27 May. Some toning spots. Frost cat US$1650. (Image)