Sale 707 The Knapp Collection of Airmail Flights

[Guests] 1930, Europe-Pan-America Round Flight, Lakehurst guest pass, business card-size pass with "Graf Zeppelin World Cruise/ Mrs. Hambrock & party (manuscript)/ Guest/ U.S. Naval Air Station/ Lakehurst, N.J."; the back of the card, instructing Marine Sentries to allow the bearer to pass "all police lines"; the dotted line for the appropriate signature is not signed; slight wear.
Estimate $100 - 150.