This is an envelope cover, issued by Liechtenstein in 1960. The cover was especially designed for the special helicopter flight from Vaduz to Zurich that took place on the 28th of May, 1960. The beautiful design of the cover showcases the theme of aviation and is particularly suitable for collectors who take a keen interest in this field. The cover has been handstamped and belongs to the pre-decimal currency era. The region of Liechtenstein is an independent nation and has a rich heritage in the field of aviation. The cover is in VG/F condition and is a must-have for enthusiasts of the aviation field.