1936 (May) Zeppelin Hindenburg 1st N.A. Return Flight MIXED FRANKING cover to England, with Bermuda 1 1/2d tied at Hamilton and 40c USA (8 x 5c) tied by flight cachet or mute ovals, sent via Frankfurt a/M with pictorial machine bs (May 14), minor soiling, very elusive and fine showpiece (Sieger 409 K, € 1’250) (Image)