Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - United States - Zeppelin Flights - 1925 (April 27-May 11), Airship (Z.R.3) Los Angeles 3 covers for Direct (2) and Return Flights to Puerto Rico, tied by Air Mail Service. New York ''Apr.27.1925'', one with extra Varick St. NY ''Apr.25'' machine cancel, return flight cover with normal ''May.6.1925'' date stamp of San Juan, appropriate receivers on the back, VF, Sieger #20T, U, Est. $250-$300