KV)1923 SWITZERLAND, SWISSAIR FIRST FLIGHT ENVELOPE FROM ZURICH TO VILNIUS WITH TWO STAMPS: ONE FROM HELVETIA OF 40 FRANCS DEPICTING A MAN WITH GLASSES AND ANOTHER FROM LITHUANIA OF 5 AURIS DEPICTING A LANDSCAPE WITH AN AIRPLANE, IT ALSO HAS A LIECHTENSTEIN POSTMARK WITH THE DATE 1.4.92.