1925 (6 May) U.S.S. Los Angeles, three covers from San Juan to New York, each with appropriate cachet and different franking, also another cover from Mayaguez, with U.S.S. Patoka Naval pmks. Also included two original picture postcards showing the Airship in flight (Image)

Est.$250

1930 (31 Mar) U.S.S. Los Angeles, First Flight under the new command of Lt.Cmdr V.A. Clarke (who succeeded Lt.Cmdr H.V. Wiley), Lakehurst departure and arrival pmks, autographed by both pilots, also with U.S. Naval Air Station letter confirming this "unofficial flight" (Image)

Est.$250

1936 Hindenburg Flight to Germany, group of four covers from TIPEX exhibition, each franked with parts or complete souvenir sheets, each with appropriate cachet, one addressed to Canada (Michel Zeppelin cat. Euro 1,600) (Image)

Est.$500

1937 (6 May) cover intended for the Hindenburg, addressed to Mrs. Berta Baer in Frankfurt, paying 40c, canceled New York, with "Airship Hindenburg" typewritten in red, arriving in Frankfurt on 17th May, fine (Image)

Est.$250

1937 (6 May) cover addressed to Hermann Sieger in Frankfurt, with 2x20c green, canceled New York, with four-line cachet "Intended for first eastbound trip of Airship "Hindenburg" in 1937. Could not be forwarded on account of accident to Airship, May 6, 1937", also "Return to Sender", with "Mail Via Airship Hindenburg" label, little adhesive toning, otherwise fine, rare (Image)

Est.$500

1937 (6 May) cover addressed to Hermann Sieger in Frankfurt, with 2x20c green, canceled New York, with four-line cachet "Intended for first eastbound trip of Airship "Hindenburg" in 1937. Could not be forwarded on account of accident to Airship, May 6, 1937", also "Return to Sender", little adhesive toning, otherwise fine, rare (Image)

Est.$500